diff --git a/keyboards/takashicompany/left_slinger/config.h b/keyboards/takashicompany/left_slinger/config.h
new file mode 100644
index 00000000000..c7ee2b29940
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/config.h
@@ -0,0 +1,8 @@
+// Copyright 2024 takashicompany (@takashicompany)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define ANALOG_JOYSTICK_X_AXIS_PIN GP28
+#define ANALOG_JOYSTICK_Y_AXIS_PIN GP29
+#define ANALOG_JOYSTICK_READ_INTERVAL 1
\ No newline at end of file
diff --git a/keyboards/takashicompany/left_slinger/custom_joystick.c b/keyboards/takashicompany/left_slinger/custom_joystick.c
new file mode 100644
index 00000000000..609d053dcb9
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/custom_joystick.c
@@ -0,0 +1,67 @@
+// Copyright 2024 takashicompany (@takashicompany)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+#include "analog.h"
+#include "gpio.h"
+#include "wait.h"
+#include "timer.h"
+#include <stdlib.h>
+#include "print.h"
+#include "custom_joystick.h"
+
+int16_t xOrigin, yOrigin;
+uint16_t lastCursor = 0;
+int16_t joystick_ratio = 100;
+int16_t joystick_raw_x = 0;
+int16_t joystick_raw_y = 0;
+
+int16_t axisCoordinate_custom(pin_t pin, uint16_t origin) {
+    int8_t  direction;              // 符号
+    int16_t distanceFromOrigin;     // 原点からの距離。負数にはならない
+
+    int16_t position = analogReadPin(pin);  // 多分だけどデフォルトだと512が中心に来るようになっている
+
+    if (origin == position) {           // 原点と同じなら0とする
+        return 0;
+    } else if (origin > position) {     // 原点よりマイナス方向の場合の処理
+         distanceFromOrigin = origin - position;
+        direction          = -1;
+    } else {                            // 原点よりプラス方向の処理
+        distanceFromOrigin = position - origin;
+        direction          = 1;
+    }
+    
+    return distanceFromOrigin * direction;
+}
+
+void pointing_device_driver_init(void) {
+    xOrigin = analogReadPin(ANALOG_JOYSTICK_X_AXIS_PIN);
+    yOrigin = analogReadPin(ANALOG_JOYSTICK_Y_AXIS_PIN);
+}
+
+report_mouse_t pointing_device_driver_get_report(report_mouse_t mouse_report) {
+
+    if (timer_elapsed(lastCursor) > ANALOG_JOYSTICK_READ_INTERVAL) {    // 多分、指定のミリ秒経過したかを見て処理を走らせている
+        lastCursor = timer_read();
+		
+        int16_t jsr = joystick_ratio;
+        if (0 <= jsr && jsr < 10) {
+            jsr = 10;
+        }
+        else if (-10 < jsr && jsr < 0) {
+            jsr = -10;
+        }
+
+        joystick_raw_x = axisCoordinate_custom(ANALOG_JOYSTICK_X_AXIS_PIN, xOrigin);
+        joystick_raw_y = axisCoordinate_custom(ANALOG_JOYSTICK_Y_AXIS_PIN, yOrigin);
+
+        mouse_report.x = joystick_raw_x / jsr;
+        mouse_report.y = joystick_raw_y / jsr;
+    }
+
+    return mouse_report;
+}
+
+uint16_t       pointing_device_driver_get_cpi(void) { return 0; }
+void           pointing_device_driver_set_cpi(uint16_t cpi) {}
\ No newline at end of file
diff --git a/keyboards/takashicompany/left_slinger/custom_joystick.h b/keyboards/takashicompany/left_slinger/custom_joystick.h
new file mode 100644
index 00000000000..dddb6553c90
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/custom_joystick.h
@@ -0,0 +1,11 @@
+// Copyright 2024 takashicompany (@takashicompany)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+extern int16_t joystick_ratio;
+extern int16_t joystick_raw_x;
+extern int16_t joystick_raw_y;
\ No newline at end of file
diff --git a/keyboards/takashicompany/left_slinger/keyboard.json b/keyboards/takashicompany/left_slinger/keyboard.json
new file mode 100644
index 00000000000..370623eb59c
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/keyboard.json
@@ -0,0 +1,59 @@
+{
+    "manufacturer": "takashicompany",
+    "keyboard_name": "Left Slinger",
+    "maintainer": "takashicompany",
+    "bootloader": "rp2040",
+    "diode_direction": "COL2ROW",
+    "encoder": {
+        "rotary": [
+            {"pin_a": "GP14", "pin_b": "GP15"}
+        ]
+    },
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true
+    },
+    "matrix_pins": {
+        "cols": ["GP5", "GP6", "GP7"],
+        "rows": ["GP8", "GP9", "GP10", "GP11", "GP12", "GP13", "GP0"]
+    },
+    "processor": "RP2040",
+    "url": "",
+    "usb": {
+        "device_version": "1.0.0",
+        "pid": "0x0061",
+        "vid": "0x7463"
+    },
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {"matrix": [0, 0], "x": 1, "y": 0},
+                {"matrix": [0, 1], "x": 2, "y": 0},
+                {"matrix": [0, 2], "x": 3, "y": 0},
+                {"matrix": [1, 0], "x": 0, "y": 1},
+                {"matrix": [1, 1], "x": 1, "y": 1},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [2, 0], "x": 3, "y": 1},
+                {"matrix": [3, 0], "x": 0, "y": 2},
+                {"matrix": [3, 1], "x": 1, "y": 2},
+                {"matrix": [3, 2], "x": 2, "y": 2},
+                {"matrix": [2, 1], "x": 3, "y": 2},
+                {"matrix": [2, 2], "x": 4.25, "y": 2},
+                {"matrix": [4, 0], "x": 1, "y": 3.25},
+                {"matrix": [4, 1], "x": 2, "y": 3.25},
+                {"matrix": [4, 2], "x": 3, "y": 3.25},
+                {"matrix": [6, 0], "x": 4.25, "y": 3.25},
+                {"matrix": [6, 1], "x": 5.25, "y": 3.25},
+                {"matrix": [5, 0], "x": 1, "y": 4.25},
+                {"matrix": [5, 1], "x": 2, "y": 4.25},
+                {"matrix": [5, 2], "x": 3, "y": 4.25},
+                {"matrix": [6, 2], "x": 4.25, "y": 4.25}
+            ]
+        }
+    }
+}
\ No newline at end of file
diff --git a/keyboards/takashicompany/left_slinger/keymaps/default/keymap.c b/keyboards/takashicompany/left_slinger/keymaps/default/keymap.c
new file mode 100644
index 00000000000..ce52b2d380c
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/keymaps/default/keymap.c
@@ -0,0 +1,83 @@
+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT(
+                 KC_Q   , KC_W   , KC_E   ,
+        MY_JSKE, KC_A   , KC_S   , KC_D   ,
+        KC_LSFT, KC_Z   , KC_X   , KC_C   , KC_V   ,
+                 KC_LCTL, KC_UP  , KC_LALT, KC_ESC , KC_ENT   ,
+                 KC_LEFT, KC_DOWN, KC_RGHT, KC_BSPC
+    ),
+
+    [1] = LAYOUT(
+                 KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  
+    ),
+
+    [2] = LAYOUT(
+                 KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  
+    ),
+
+    [3] = LAYOUT(
+                 KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  
+    ),
+
+    [4] = LAYOUT(
+                 KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  
+    ),
+
+    [5] = LAYOUT(
+                 KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  
+    ),
+
+    [6] = LAYOUT(
+                 KC_NO  , KC_NO  , KC_NO  ,
+        KC_TRNS, MY_BTN2, MY_SCRL, MY_BTN1,
+        KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  , KC_NO  ,
+                 KC_NO  , KC_NO  , KC_NO  , KC_NO  
+    ),
+
+    [7] = LAYOUT(
+                 KC_NO  , KC_NO  , KC_NO  ,
+        KC_NO  , KC_NO  , MY_CLKD, MY_CLKI,
+        QK_BOOT, KC_NO  , MY_SCDV, MY_SCDH, KC_NO  ,
+                 MY_JSKD, MY_JSDD, MY_JSDI, KC_NO  , KC_NO  ,
+                 KC_NO  , MY_STGE, KC_NO  , KC_NO  
+    ),
+};
+
+#if defined(ENCODER_MAP_ENABLE)
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][NUM_DIRECTIONS] = {
+    [0] =   { ENCODER_CCW_CW(MS_WHLD, MS_WHLU) },
+    [1] =   { ENCODER_CCW_CW(MS_WHLL, MS_WHLR) },
+    [2] =   { ENCODER_CCW_CW(KC_TRNS, KC_TRNS) },
+    [3] =   { ENCODER_CCW_CW(KC_TRNS, KC_TRNS) },
+    [4] =   { ENCODER_CCW_CW(KC_TRNS, KC_TRNS) },
+    [5] =   { ENCODER_CCW_CW(KC_TRNS, KC_TRNS) },
+    [6] =   { ENCODER_CCW_CW(KC_TRNS, KC_TRNS) },
+    [7] =   { ENCODER_CCW_CW(KC_TRNS, KC_TRNS) }
+};
+#endif
diff --git a/keyboards/takashicompany/left_slinger/keymaps/default/rules.mk b/keyboards/takashicompany/left_slinger/keymaps/default/rules.mk
new file mode 100644
index 00000000000..a40474b4d5c
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/keymaps/default/rules.mk
@@ -0,0 +1 @@
+ENCODER_MAP_ENABLE = yes
\ No newline at end of file
diff --git a/keyboards/takashicompany/left_slinger/left_slinger.c b/keyboards/takashicompany/left_slinger/left_slinger.c
new file mode 100644
index 00000000000..be57a8332bd
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/left_slinger.c
@@ -0,0 +1,531 @@
+// #include <stdio.h>
+#include "quantum.h"
+#include "left_slinger.h"
+#include "custom_joystick.h"
+
+#if CONSOLE_ENABLE
+#include <print.h>
+#endif
+
+/////////////////////////////
+/// miniZoneの実装 ここから ///
+////////////////////////////
+
+#define MOUSE_SCROLL_V_REVERSE_BIT  (1 << 0) // 0000 0001
+#define MOUSE_SCROLL_H_REVERSE_BIT  (1 << 1) // 0000 0010
+#define JOYSTICK_KEY_DEFAULT_ENABLE (1 << 2) // 0000 0100
+
+enum click_state {
+    NONE = 0,
+    WAITING,    // マウスレイヤーが有効になるのを待つ。 Wait for mouse layer to activate.
+    CLICKABLE,  // マウスレイヤー有効になりクリック入力が取れる。 Mouse layer is enabled to take click input.
+    CLICKING,   // クリック中。 Clicking.
+    SCROLLING   // スクロール中。 Scrolling.
+};
+
+typedef union {
+  uint32_t raw;
+
+  struct {
+    // int16_t to_clickable_time; // // この秒数(千分の一秒)、WAITING状態ならクリックレイヤーが有効になる。  For this number of seconds (milliseconds), if in WAITING state, the click layer is activated.
+    int16_t joystick_ratio;
+    int8_t to_clickable_movement;
+    uint8_t settings;
+  };
+} user_config_t;
+
+user_config_t user_config;
+
+enum click_state state;     // 現在のクリック入力受付の状態 Current click input reception status
+uint16_t click_timer;       // タイマー。状態に応じて時間で判定する。 Timer. Time to determine the state of the system.
+
+// uint16_t to_clickable_time = 50;   // この秒数(千分の一秒)、WAITING状態ならクリックレイヤーが有効になる。  For this number of seconds (milliseconds), if in WAITING state, the click layer is activated.
+uint16_t to_reset_time = 1000; // この秒数(千分の一秒)、CLICKABLE状態ならクリックレイヤーが無効になる。 For this number of seconds (milliseconds), the click layer is disabled if in CLICKABLE state.
+
+const uint16_t click_layer = 6;   // マウス入力が可能になった際に有効になるレイヤー。Layers enabled when mouse input is enabled
+const uint16_t setting_layer = 7;
+
+int16_t scroll_v_mouse_interval_counter;   // 垂直スクロールの入力をカウントする。　Counting Vertical Scroll Inputs
+int16_t scroll_h_mouse_interval_counter;   // 水平スクロールの入力をカウントする。  Counts horizontal scrolling inputs.
+
+int16_t scroll_v_threshold = 50;    // この閾値を超える度に垂直スクロールが実行される。 Vertical scrolling is performed each time this threshold is exceeded.
+int16_t scroll_h_threshold = 50;    // この閾値を超える度に水平スクロールが実行される。 Each time this threshold is exceeded, horizontal scrolling is performed.
+
+int16_t after_click_lock_movement = 0;      // クリック入力後の移動量を測定する変数。 Variable that measures the amount of movement after a click input.
+
+int16_t mouse_record_threshold = 30;    // ポインターの動きを一時的に記録するフレーム数。 Number of frames in which the pointer movement is temporarily recorded.
+int16_t mouse_move_count_ratio = 5;     // ポインターの動きを再生する際の移動フレームの係数。 The coefficient of the moving frame when replaying the pointer movement.
+
+const uint16_t ignore_disable_mouse_layer_keys[] = {KC_LGUI, KC_LCTL};   // この配列で指定されたキーはマウスレイヤー中に押下してもマウスレイヤーを解除しない
+
+int16_t mouse_movement;
+
+bool joystick_key_flag = false;
+
+void eeconfig_init_kb(void) {
+    user_config.raw = 0;
+    user_config.joystick_ratio = 100;
+    user_config.to_clickable_movement = 50;
+    // 新しいビットフィールド設定
+    
+    user_config.settings = 0; // 初期化
+    user_config.settings |= MOUSE_SCROLL_V_REVERSE_BIT * false; // ここでfalseなので実際にはセットしない
+    user_config.settings |= MOUSE_SCROLL_H_REVERSE_BIT * false; // 同上
+    user_config.settings |= JOYSTICK_KEY_DEFAULT_ENABLE * false;
+    
+    eeconfig_update_kb(user_config.raw);
+}
+
+bool get_mouse_scroll_v_reverse(void) {
+    return user_config.settings & MOUSE_SCROLL_V_REVERSE_BIT;
+}
+
+bool get_mouse_scroll_h_reverse(void) {
+    return user_config.settings & MOUSE_SCROLL_H_REVERSE_BIT;
+}
+
+void set_mouse_scroll_v_reverse(bool value) {
+    if (value) {
+        user_config.settings |= MOUSE_SCROLL_V_REVERSE_BIT;
+    } else {
+        user_config.settings &= ~MOUSE_SCROLL_V_REVERSE_BIT;
+    }
+}
+
+void set_mouse_scroll_h_reverse(bool value) {
+    if (value) {
+        user_config.settings |= MOUSE_SCROLL_H_REVERSE_BIT;
+    } else {
+        user_config.settings &= ~MOUSE_SCROLL_H_REVERSE_BIT;
+    }
+}
+
+bool get_joystick_key_default_enable(void) {
+    return user_config.settings & JOYSTICK_KEY_DEFAULT_ENABLE;
+}
+
+void set_joystick_key_default_enable(bool value) {
+    if (value) {
+        user_config.settings |= JOYSTICK_KEY_DEFAULT_ENABLE;
+    } else {
+        user_config.settings &= ~JOYSTICK_KEY_DEFAULT_ENABLE;
+    }
+}
+
+void keyboard_post_init_kb(void) {
+    user_config.raw = eeconfig_read_kb();
+    joystick_ratio = user_config.joystick_ratio;
+}
+
+// クリック用のレイヤーを有効にする。　Enable layers for clicks
+void enable_click_layer(void) {
+    layer_on(click_layer);
+    click_timer = timer_read();
+    state = CLICKABLE;
+}
+
+// クリック用のレイヤーを無効にする。 Disable layers for clicks.
+void disable_click_layer(void) {
+    state = NONE;
+    layer_off(click_layer);
+    scroll_v_mouse_interval_counter = 0;
+    scroll_h_mouse_interval_counter = 0;
+}
+
+bool setting_flags[4] = { false, false, false, false };
+
+void enable_setting_layer(void) {
+    for (int i = 0; i < 4; i++)
+    {
+        setting_flags[i] = false;
+    }
+    layer_on(setting_layer);
+
+    SEND_STRING(" Setting Layer Start.");
+}
+
+void disable_setting_layer(void) {
+
+    for (int i = 0; i < 4; i++)
+    {
+        setting_flags[i] = false;
+    }
+
+    layer_off(setting_layer);
+    SEND_STRING(" Setting Layer End.");
+}
+
+// 自前の絶対数を返す関数。 Functions that return absolute numbers.
+int8_t my_abs(int8_t num) {
+    if (num < 0) {
+        num = -num;
+    }
+
+    return num;
+}
+
+int16_t my_abs_16(int16_t num) {
+    if (num < 0) {
+        num = -num;
+    }
+
+    return num;
+}
+
+// 現在クリックが可能な状態か。 Is it currently clickable?
+bool is_clickable_mode(void) {
+    return state == CLICKABLE || state == CLICKING || state == SCROLLING;
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+
+    if (record->event.key.row == 0 && record->event.key.col == 0)
+    {
+        setting_flags[0] = record->event.pressed;
+    }
+
+    if (record->event.key.row == 0 && record->event.key.col == 2)
+    {
+        setting_flags[1] = record->event.pressed;
+    }
+
+    if (record->event.key.row == 5 && record->event.key.col == 0)
+    {
+        setting_flags[2] = record->event.pressed;
+    }
+
+    if (record->event.key.row == 5 && record->event.key.col == 2)
+    {
+        setting_flags[3] = record->event.pressed;
+    }
+
+    for (int i = 0; i < 4; i++)
+    {
+        if (!setting_flags[i])
+        {
+            break;
+        }
+
+        if (i == 3)
+        {
+            enable_setting_layer();
+            return true;
+        }
+    }
+
+
+    switch (keycode) {
+        case MY_BTN1:
+        case MY_BTN2:
+        case MY_BTN3:
+        {
+            report_mouse_t currentReport = pointing_device_get_report();
+
+            // どこのビットを対象にするか。 Which bits are to be targeted?
+            uint8_t btn = 1 << (keycode - MY_BTN1);
+            
+            if (record->event.pressed) {
+                // ビットORは演算子の左辺と右辺の同じ位置にあるビットを比較して、両方のビットのどちらかが「1」の場合に「1」にします。
+                // Bit OR compares bits in the same position on the left and right sides of the operator and sets them to "1" if either of both bits is "1".
+                currentReport.buttons |= btn;
+                state = CLICKING;
+                after_click_lock_movement = 30;
+            } else {
+                // ビットANDは演算子の左辺と右辺の同じ位置にあるビットを比較して、両方のビットが共に「1」の場合だけ「1」にします。
+                // Bit AND compares the bits in the same position on the left and right sides of the operator and sets them to "1" only if both bits are "1" together.
+                currentReport.buttons &= ~btn;
+            }
+
+            enable_click_layer();
+
+            pointing_device_set_report(currentReport);
+            pointing_device_send();
+            return false;
+        }
+
+        case MY_SCRL:
+            if (record->event.pressed) {
+                state = SCROLLING;
+            } else {
+                enable_click_layer();   // スクロールキーを離した時に再度クリックレイヤーを有効にする。 Enable click layer again when the scroll key is released.
+            }
+         return false;
+        
+        case MY_CLKI:
+            if (record->event.pressed) {
+                user_config.to_clickable_movement += 5;
+                eeconfig_update_kb(user_config.raw);
+            }
+            return false;
+
+        case MY_CLKD:
+            if (record->event.pressed) {
+
+                user_config.to_clickable_movement -= 5;
+
+                if (user_config.to_clickable_movement < 5) {
+                    user_config.to_clickable_movement = 5;
+                }
+
+                eeconfig_update_kb(user_config.raw);
+            }
+            return false;
+        
+        case MY_SCDV:
+            if (record->event.pressed) {
+                set_mouse_scroll_v_reverse(!get_mouse_scroll_v_reverse());
+                eeconfig_update_kb(user_config.raw);
+            }
+            return false;
+        
+        case MY_SCDH:
+            if (record->event.pressed) {
+                set_mouse_scroll_h_reverse(!get_mouse_scroll_h_reverse());
+                eeconfig_update_kb(user_config.raw);
+            }
+            return false;
+
+        case MY_JSDI:
+            if  (record->event.pressed) {
+                joystick_ratio = joystick_ratio + 5;
+                user_config.joystick_ratio = joystick_ratio;
+                eeconfig_update_kb(user_config.raw);
+            }
+            
+            break;
+
+        case MY_JSDD:
+            if  (record->event.pressed) {
+                joystick_ratio = joystick_ratio - 5;
+                user_config.joystick_ratio = joystick_ratio;
+                eeconfig_update_kb(user_config.raw);
+            }
+            
+            break;
+
+        case MY_STGE:
+            if  (record->event.pressed) {
+                disable_setting_layer();
+            }
+            break;
+        
+        case MY_JSKD:
+            if (record->event.pressed) {
+                set_joystick_key_default_enable(!get_joystick_key_default_enable());
+                eeconfig_update_kb(user_config.raw);
+            }
+            break;
+        
+        case MY_JSKE:
+            joystick_key_flag = record->event.pressed;
+            break;
+
+         default:
+            if  (record->event.pressed) {
+                
+                if (state == CLICKING || state == SCROLLING)
+                {
+                    enable_click_layer();
+                    return false;
+                }
+                
+                for (int i = 0; i < sizeof(ignore_disable_mouse_layer_keys) / sizeof(ignore_disable_mouse_layer_keys[0]); i++)
+                {
+                    if (keycode == ignore_disable_mouse_layer_keys[i])
+                    {
+                        enable_click_layer();
+                        return true;
+                    }
+                }
+
+                disable_click_layer();
+            }
+    }
+
+    return process_record_user(keycode, record);
+}
+
+int8_t joystick_key_column = -1;
+uint16_t joystick_key_timer;
+
+void reset_joystick_key(void) {
+    if (joystick_key_column >= 0) {
+        action_exec(MAKE_KEYEVENT(6, joystick_key_column, false));
+    }
+
+    joystick_key_column = -1;
+}
+
+void press_joystick_key(int8_t column) {
+
+    joystick_key_timer = timer_read();
+    
+    if (joystick_key_column == column /* || timer_elapsed(joystick_key_timer) < 200*/) {
+        return;
+    }
+
+    reset_joystick_key();
+
+    joystick_key_column = column;
+    joystick_key_timer = timer_read();
+    action_exec(MAKE_KEYEVENT(6, column, true));
+}
+
+report_mouse_t pointing_device_task_kb(report_mouse_t mouse_report) {
+    int8_t current_x = mouse_report.x;
+    int8_t current_y = mouse_report.y;
+    int8_t current_h = 0;
+    int8_t current_v = 0;
+    
+    if (get_joystick_key_default_enable() != joystick_key_flag) {
+#ifdef CONSOLE_ENABLE
+        uprintf("x: %d, y: %d, raw_x: %d, raw_y: %d \n", current_x, current_y, joystick_raw_x, joystick_raw_y);
+#endif
+        if ((current_x != 0 || current_y != 0) &&
+            (joystick_raw_x > 100 || joystick_raw_y > 100) == false &&
+            (my_abs_16(joystick_raw_x) + my_abs_16(joystick_raw_y) > 350)){
+           
+            if (joystick_raw_y < joystick_raw_x * 4) {
+                // 上
+                press_joystick_key(1);
+            } else if (joystick_raw_x < joystick_raw_y * 5) {
+                press_joystick_key(2);
+            } else {
+                press_joystick_key(0);
+            }
+        }
+        else {
+            if (timer_elapsed(joystick_key_timer) > 100) {
+                reset_joystick_key();
+            }
+        }
+
+        mouse_report.x = 0;
+        mouse_report.y = 0;
+        mouse_report.h = 0;
+        mouse_report.v = 0;
+
+        return mouse_report;
+    }
+    else {
+        reset_joystick_key();
+    }
+
+    if (current_x != 0 || current_y != 0) {
+        
+        switch (state) {
+            case CLICKABLE:
+                click_timer = timer_read();
+                break;
+
+            case CLICKING:
+                after_click_lock_movement -= my_abs(current_x) + my_abs(current_y);
+
+                if (after_click_lock_movement > 0) {
+                    current_x = 0;
+                    current_y = 0;
+                }
+
+                break;
+
+            case SCROLLING:
+            {
+                int8_t rep_v = 0;
+                int8_t rep_h = 0;
+
+                // 垂直スクロールの方の感度を高める。 Increase sensitivity toward vertical scrolling.
+                if (my_abs(current_y) * 2 > my_abs(current_x)) {
+
+                    scroll_v_mouse_interval_counter += current_y;
+                    while (my_abs(scroll_v_mouse_interval_counter) > scroll_v_threshold) {
+                        if (scroll_v_mouse_interval_counter < 0) {
+                            scroll_v_mouse_interval_counter += scroll_v_threshold;
+                            rep_v += scroll_v_threshold;
+                        } else {
+                            scroll_v_mouse_interval_counter -= scroll_v_threshold;
+                            rep_v -= scroll_v_threshold;
+                        }
+                        
+                    }
+                } else {
+
+                    scroll_h_mouse_interval_counter += current_x;
+
+                    while (my_abs(scroll_h_mouse_interval_counter) > scroll_h_threshold) {
+                        if (scroll_h_mouse_interval_counter < 0) {
+                            scroll_h_mouse_interval_counter += scroll_h_threshold;
+                            rep_h += scroll_h_threshold;
+                        } else {
+                            scroll_h_mouse_interval_counter -= scroll_h_threshold;
+                            rep_h -= scroll_h_threshold;
+                        }
+                    }
+                }
+
+                current_h = rep_h / scroll_h_threshold * (get_mouse_scroll_h_reverse() ? -1 : 1);
+                current_v = -rep_v / scroll_v_threshold * (get_mouse_scroll_v_reverse() ? -1 : 1);
+                current_x = 0;
+                current_y = 0;
+            }
+                break;
+
+            case WAITING:
+                /*
+                if (timer_elapsed(click_timer) > user_config.to_clickable_time) {
+                    enable_click_layer();
+                }
+                */
+
+                mouse_movement += my_abs(current_x) + my_abs(current_y);
+
+                if (mouse_movement >= user_config.to_clickable_movement)
+                {
+                    mouse_movement = 0;
+                    enable_click_layer();
+                }
+                break;
+
+            default:
+                click_timer = timer_read();
+                state = WAITING;
+                mouse_movement = 0;
+        }
+    }
+    else
+    {
+        switch (state) {
+            case CLICKING:
+            case SCROLLING:
+
+                break;
+
+            case CLICKABLE:
+                if (timer_elapsed(click_timer) > to_reset_time) {
+                    disable_click_layer();
+                }
+                break;
+
+             case WAITING:
+                if (timer_elapsed(click_timer) > 50) {
+                    mouse_movement = 0;
+                    state = NONE;
+                }
+                break;
+
+            default:
+                mouse_movement = 0;
+                state = NONE;
+        }
+    }
+
+    mouse_report.x = current_x;
+    mouse_report.y = current_y;
+    mouse_report.h = current_h;
+    mouse_report.v = current_v;
+
+    return mouse_report;
+}
+
+/////////////////////////////
+/// miniZoneの実装 ここまで ///
+////////////////////////////
\ No newline at end of file
diff --git a/keyboards/takashicompany/left_slinger/left_slinger.h b/keyboards/takashicompany/left_slinger/left_slinger.h
new file mode 100644
index 00000000000..318506e832e
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/left_slinger.h
@@ -0,0 +1,22 @@
+// Copyright 2024 takashicompany (@takashicompany)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "quantum.h"
+
+enum custom_keycodes_kb {
+    MY_BTN1 = SAFE_RANGE,
+    MY_BTN2,
+    MY_BTN3,
+    MY_SCRL,	// Scroll
+    MY_CLKI,	// Click time increase
+    MY_CLKD,	// Click time decrease
+    MY_SCDV,	// Scroll vertical
+    MY_SCDH,	// Scroll horizontal
+    MY_JSDI,	// Joy stick movement divisor increase
+    MY_JSDD,	// Joy stick movement divisor decrease
+    MY_STGE,    // Setting End
+    MY_JSKD,    // Joy stick key default
+    MY_JSKE,    // Joy stick key enable
+};
\ No newline at end of file
diff --git a/keyboards/takashicompany/left_slinger/readme.md b/keyboards/takashicompany/left_slinger/readme.md
new file mode 100644
index 00000000000..5419cb7c4e0
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/readme.md
@@ -0,0 +1,27 @@
+# takashicompany/left_slinger
+
+![takashicompany/left_slinger](https://i.imgur.com/7U0BMuT.jpeg)
+
+Left Slinger is a left hand only macro pad & gaming device with joystick and rotary encoder.
+
+* Keyboard Maintainer: [takashicompany](https://github.com/takashicompany)
+* Hardware Supported: PCB, RP2040-Zero
+* Hardware Availability: https://github.com/takashicompany/left_slinger
+
+Make example for this keyboard (after setting up your build environment):
+
+    make takashicompany/left_slinger:default
+
+Flashing example for this keyboard:
+
+    make takashicompany/left_slinger:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available
diff --git a/keyboards/takashicompany/left_slinger/rules.mk b/keyboards/takashicompany/left_slinger/rules.mk
new file mode 100644
index 00000000000..535ec48bd85
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/rules.mk
@@ -0,0 +1,4 @@
+POINTING_DEVICE_ENABLE = yes
+POINTING_DEVICE_DRIVER = custom
+ANALOG_DRIVER_REQUIRED = yes
+SRC += custom_joystick.c