diff --git a/keyboards/takashicompany/left_slinger/keyboard.json b/keyboards/takashicompany/left_slinger/keyboard.json
new file mode 100644
index 00000000000..137de5c0035
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/keyboard.json
@@ -0,0 +1,187 @@
+{
+    "manufacturer": "takashicompany",
+    "keyboard_name": "Left Slinger",
+    "maintainer": "takashicompany",
+    "bootloader": "rp2040",
+    "diode_direction": "COL2ROW",
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true
+    },
+    "matrix_pins": {
+        "cols": [
+            "GP5",
+            "GP6",
+            "GP7"
+        ],
+        "rows": [
+            "GP8",
+            "GP9",
+            "GP10",
+            "GP11",
+            "GP12",
+            "GP13"
+        ]
+    },
+    "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": 2.25
+                },
+                {
+                    "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": [
+                        5,
+                        0
+                    ],
+                    "x": 1,
+                    "y": 4.25
+                },
+                {
+                    "matrix": [
+                        5,
+                        1
+                    ],
+                    "x": 2,
+                    "y": 4.25
+                },
+                {
+                    "matrix": [
+                        5,
+                        2
+                    ],
+                    "x": 3,
+                    "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..5bf2989a196
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/keymaps/default/keymap.c
@@ -0,0 +1,25 @@
+// Copyright 2023 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /*
+     * ┌───┬───┬───┬───┐
+     * │ 7 │ 8 │ 9 │ / │
+     * ├───┼───┼───┼───┤
+     * │ 4 │ 5 │ 6 │ * │
+     * ├───┼───┼───┼───┤
+     * │ 1 │ 2 │ 3 │ - │
+     * ├───┼───┼───┼───┤
+     * │ 0 │ . │Ent│ + │
+     * └───┴───┴───┴───┘
+     */
+    [0] = LAYOUT(
+              KC_1, KC_2, KC_3,
+        KC_4, KC_5, KC_6, KC_7,
+        KC_8, KC_9, KC_0, KC_A, KC_B,
+              KC_C, KC_D, KC_E,
+              KC_F, KC_G, KC_H
+    )
+};
diff --git a/keyboards/takashicompany/left_slinger/readme.md b/keyboards/takashicompany/left_slinger/readme.md
new file mode 100644
index 00000000000..798c3556f9d
--- /dev/null
+++ b/keyboards/takashicompany/left_slinger/readme.md
@@ -0,0 +1,27 @@
+# takashicompany/left_slinger
+
+![takashicompany/left_slinger](imgur.com image replace me!)
+
+*A short description of the keyboard/project*
+
+* Keyboard Maintainer: [takashicompany](https://github.com/takashicompany)
+* Hardware Supported: *The PCBs, controllers supported*
+* Hardware Availability: *Links to where you can find this hardware*
+
+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