diff --git a/keyboards/plum47/config.h b/keyboards/plum47/config.h
new file mode 100644
index 000000000000..cde3481a8f9c
--- /dev/null
+++ b/keyboards/plum47/config.h
@@ -0,0 +1,159 @@
+/*
+Copyright 2020 Masayuki Takagi
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see .
+*/
+
+#pragma once
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID 0xFEED
+#define PRODUCT_ID 0x0000
+#define DEVICE_VER 0x0001
+#define MANUFACTURER Masayuki Takagi
+#define PRODUCT plum47
+
+/* key matrix size */
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 12
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ * ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS { D1, D0, D4, C6 }
+#define MATRIX_COL_PINS { F4, F5, F6, F7, B1, B3, B2, B6, B5, B4, E6, D7 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* Mod-Tap */
+#define PERMISSIVE_HOLD
+
+/* Mouse keys */
+#define MK_3_SPEED
+#define MK_MOMENTARY_ACCEL
+#define MK_C_OFFSET_UNMOD 8
+#define MK_C_OFFSET_1 3
+#define MK_C_OFFSET_2 20
+#define MK_W_INTERVAL_UNMOD 80
+#define MK_W_INTERVAL_1 120
+#define MK_W_INTERVAL_2 40
+
+/*
+ * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
+ */
+#define SOFT_SERIAL_PIN D0 // or D1, D2, D3, E6
+
+//#define BACKLIGHT_PIN B7
+//#define BACKLIGHT_LEVELS 3
+//#define BACKLIGHT_BREATHING
+
+//#define RGB_DI_PIN E2
+//#ifdef RGB_DI_PIN
+//# define RGBLED_NUM 16
+//# define RGBLIGHT_HUE_STEP 8
+//# define RGBLIGHT_SAT_STEP 8
+//# define RGBLIGHT_VAL_STEP 8
+//# define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+//# define RGBLIGHT_SLEEP /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+/*== all animations enable ==*/
+//# define RGBLIGHT_ANIMATIONS
+/*== or choose animations ==*/
+//# define RGBLIGHT_EFFECT_BREATHING
+//# define RGBLIGHT_EFFECT_RAINBOW_MOOD
+//# define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+//# define RGBLIGHT_EFFECT_SNAKE
+//# define RGBLIGHT_EFFECT_KNIGHT
+//# define RGBLIGHT_EFFECT_CHRISTMAS
+//# define RGBLIGHT_EFFECT_STATIC_GRADIENT
+//# define RGBLIGHT_EFFECT_RGB_TEST
+//# define RGBLIGHT_EFFECT_ALTERNATING
+/*== customize breathing effect ==*/
+/*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+//# define RGBLIGHT_BREATHE_TABLE_SIZE 256 // 256(default) or 128 or 64
+/*==== use exp() and sin() ====*/
+//# define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85 // 1 to 2.7
+//# define RGBLIGHT_EFFECT_BREATHE_MAX 255 // 0 to 255
+//#endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is useful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+//#define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * Feature disable options
+ * These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+//#define NO_DEBUG
+
+/* disable print */
+//#define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+
+/* Bootmagic Lite key configuration */
+//#define BOOTMAGIC_LITE_ROW 0
+//#define BOOTMAGIC_LITE_COLUMN 0
diff --git a/keyboards/plum47/info.json b/keyboards/plum47/info.json
new file mode 100644
index 000000000000..a15e761bcf99
--- /dev/null
+++ b/keyboards/plum47/info.json
@@ -0,0 +1,19 @@
+{
+ "keyboard_name": "plum47",
+ "url": "",
+ "maintainer": "Masayuki Takagi",
+ "width": 3,
+ "height": 2,
+ "layouts": {
+ "LAYOUT": {
+ "layout": [
+ {"label": "k00", "x": 0, "y": 0},
+ {"label": "k01", "x": 1, "y": 0},
+ {"label": "k02", "x": 2, "y": 0},
+
+ {"label": "k10", "x": 0, "y": 1, "w": 1.5},
+ {"label": "k12", "x": 1.5, "y": 1, "w": 1.5}
+ ]
+ }
+ }
+}
diff --git a/keyboards/plum47/keymaps/default/keymap.c b/keyboards/plum47/keymaps/default/keymap.c
new file mode 100644
index 000000000000..69d34300a5b6
--- /dev/null
+++ b/keyboards/plum47/keymaps/default/keymap.c
@@ -0,0 +1,111 @@
+/* Copyright 2020 Masayuki Takagi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#include QMK_KEYBOARD_H
+
+// Defines names for use in layer keycodes and the keymap
+enum layer_names {
+ _QWERTY,
+ _LOWER,
+ _RAISE
+};
+
+// Defines the keycodes used by our macros in process_record_user
+enum custom_keycodes {
+ QMKBEST = SAFE_RANGE,
+ QMKURL
+};
+
+#define LOWER MO(_LOWER)
+#define RAISE MO(_RAISE)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+/* Qwerty
+ * ,-----------------------------------------------------------------------------------.
+ * | Tab | Q | W | E | R | T | Y | U | I | O | P | Bksp |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Esc | A | S | D | F | G | H | J | K | L | ; | ' |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Shift| Z | X | C | V | B | N | M | , | . | / |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Brite| Ctrl | Alt | GUI |Lower | Space |Raise | Left | Down | Up |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_QWERTY] = LAYOUT(
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSPC,
+ KC_ESC, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_ENT ,
+ KC_NO, KC_LCTL, KC_LALT, KC_LGUI, LOWER, KC_SPC, RAISE, KC_LEFT, KC_DOWN, KC_UP, KC_RGHT
+),
+
+/* Lower
+ * ,-----------------------------------------------------------------------------------.
+ * | ~ | ! | @ | # | $ | % | ^ | & | * | ( | ) | Bksp |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Del | F1 | F2 | F3 | F4 | F5 | F6 | _ | + | { | } | | |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | F7 | F8 | F9 | F10 | F11 | F12 | | | Home | End | |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | | | | | | | Next | Vol- | Vol+ | Play |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_LOWER] = LAYOUT(
+ KC_TILD, KC_EXLM, KC_AT, KC_HASH, KC_DLR, KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC,
+ KC_DEL, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______, _______, KC_HOME, KC_END, _______,
+ _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+),
+
+/* Raise
+ * ,-----------------------------------------------------------------------------------.
+ * | ` | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | Bksp |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Del | F1 | F2 | F3 | F4 | F5 | F6 | - | = | [ | ] | \ |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | F7 | F8 | F9 | F10 | F11 | F12 | | |Pg Up |Pg Dn | |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | | | | | | | Next | Vol- | Vol+ | Play |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_RAISE] = LAYOUT(
+ KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_BSPC,
+ KC_DEL, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_MINS, KC_EQL, KC_LBRC, KC_RBRC, KC_BSLS,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______, _______, KC_PGUP, KC_PGDN, _______,
+ _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+)
+
+};
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ switch (keycode) {
+ case QMKBEST:
+ if (record->event.pressed) {
+ // when keycode QMKBEST is pressed
+ SEND_STRING("QMK is the best thing ever!");
+ } else {
+ // when keycode QMKBEST is released
+ }
+ break;
+ case QMKURL:
+ if (record->event.pressed) {
+ // when keycode QMKURL is pressed
+ SEND_STRING("https://qmk.fm/\n");
+ } else {
+ // when keycode QMKURL is released
+ }
+ break;
+ }
+ return true;
+}
diff --git a/keyboards/plum47/keymaps/default/readme.md b/keyboards/plum47/keymaps/default/readme.md
new file mode 100644
index 000000000000..752a586b0397
--- /dev/null
+++ b/keyboards/plum47/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default keymap for plum47
diff --git a/keyboards/plum47/keymaps/takagi/keymap.c b/keyboards/plum47/keymaps/takagi/keymap.c
new file mode 100644
index 000000000000..409e74b45548
--- /dev/null
+++ b/keyboards/plum47/keymaps/takagi/keymap.c
@@ -0,0 +1,156 @@
+/* Copyright 2020 Masayuki Takagi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+#include QMK_KEYBOARD_H
+
+// Defines names for use in layer keycodes and the keymap
+enum layer_names {
+ _BASE,
+ _LOWER,
+ _RAISE,
+ _LCTRL,
+ _MOUSE,
+ _WHEEL
+};
+
+// Defines the keycodes used by our macros in process_record_user
+enum custom_keycodes {
+ QMKBEST = SAFE_RANGE,
+ QMKURL
+};
+
+#define KANA KC_LANG1
+#define EISU KC_LANG2
+#define LOWER MO(_LOWER)
+#define RAISE MO(_RAISE)
+#define MOUSE MO(_MOUSE)
+#define WHEEL MO(_WHEEL)
+#define LO_EISU LT(_LOWER, EISU)
+#define RA_KANA LT(_RAISE, KANA)
+#define MOUSE_D LT(_MOUSE, KC_D)
+#define LCT_ESC LT(_LCTRL, KC_ESC)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+/* Base
+ * ,-----------------------------------------------------------------------------------.
+ * | Tab | Q | W | E | R | T | Y | U | I | O | P | Bksp |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Esc | A | S | D | F | G | H | J | K | L | ; |Enter |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Shift| Z | X | C | V | B | N | M | , | . | / | ' |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | Caps | Alt | GUI |Lower | Space |Raise | Left | Down | Up |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_BASE] = LAYOUT(
+ KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSPC,
+ LCT_ESC, KC_A, KC_S, MOUSE_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_ENT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, MT(MOD_RSFT, KC_QUOT),
+ KC_NO, KC_CAPS, KC_LALT, KC_LGUI, LO_EISU, KC_SPC, RA_KANA, KC_LEFT, KC_DOWN, KC_UP, KC_RGHT
+),
+
+/* Lower
+ * ,-----------------------------------------------------------------------------------.
+ * | ~ | ! | @ | # | $ | % | ^ | & | * | ( | ) | Del |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | F1 | F2 | F3 | F4 | F5 | F6 | _ | + | { | } | | |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | F7 | F8 | F9 | F10 | F11 | F12 | | End | Home | | |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | | | | | | | | Vol- | Vol+ | |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_LOWER] = LAYOUT(
+ KC_TILD, KC_EXLM, KC_AT, KC_HASH, KC_DLR, KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_DEL,
+ _______, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______, KC_END , KC_HOME, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_VOLD, KC_VOLU, _______
+),
+
+/* Raise
+ * ,-----------------------------------------------------------------------------------.
+ * | ` | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | Del |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | F1 | F2 | F3 | F4 | F5 | F6 | - | = | [ | ] | \ |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | F7 | F8 | F9 | F10 | F11 | F12 | |Pg Dn |Pg Up | | |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | | | | | | | | | Vol- | Vol+ | |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_RAISE] = LAYOUT(
+ KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_DEL,
+ _______, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_MINS, KC_EQL, KC_LBRC, KC_RBRC, KC_BSLS,
+ _______, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______, KC_PGDN, KC_PGUP, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_VOLD, KC_VOLU, _______
+),
+
+[_LCTRL] = LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, KC_D, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+),
+
+[_MOUSE] = LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, KC_BTN1, KC_MS_U, KC_BTN2, _______, _______,
+ _______, _______, WHEEL, _______, KC_ACL1, KC_ACL2, _______, KC_MS_L, KC_MS_D, KC_MS_R, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_BTN3, KC_BTN4, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+),
+
+[_WHEEL] = LAYOUT(
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_WH_U, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, KC_WH_L, KC_WH_D, KC_WH_R, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+)
+
+};
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+ switch (keycode) {
+ case QMKBEST:
+ if (record->event.pressed) {
+ // when keycode QMKBEST is pressed
+ SEND_STRING("QMK is the best thing ever!");
+ } else {
+ // when keycode QMKBEST is released
+ }
+ break;
+ case QMKURL:
+ if (record->event.pressed) {
+ // when keycode QMKURL is pressed
+ SEND_STRING("https://qmk.fm/\n");
+ } else {
+ // when keycode QMKURL is released
+ }
+ break;
+ }
+ return true;
+}
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+ switch (get_highest_layer(state)) {
+ case _LCTRL:
+ register_code(KC_LCTL);
+ break;
+ default:
+ unregister_code(KC_LCTL);
+ break;
+ }
+ return state;
+}
diff --git a/keyboards/plum47/keymaps/takagi/readme.md b/keyboards/plum47/keymaps/takagi/readme.md
new file mode 100644
index 000000000000..752a586b0397
--- /dev/null
+++ b/keyboards/plum47/keymaps/takagi/readme.md
@@ -0,0 +1 @@
+# The default keymap for plum47
diff --git a/keyboards/plum47/plum47.c b/keyboards/plum47/plum47.c
new file mode 100644
index 000000000000..376f9e03ba9a
--- /dev/null
+++ b/keyboards/plum47/plum47.c
@@ -0,0 +1,17 @@
+/* Copyright 2020 Masayuki Takagi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#include "plum47.h"
diff --git a/keyboards/plum47/plum47.h b/keyboards/plum47/plum47.h
new file mode 100644
index 000000000000..14fecb14e9a9
--- /dev/null
+++ b/keyboards/plum47/plum47.h
@@ -0,0 +1,39 @@
+/* Copyright 2020 Masayuki Takagi
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see .
+ */
+
+#pragma once
+
+#include "quantum.h"
+
+/* This is a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+#define LAYOUT( \
+ k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b, \
+ k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b, \
+ k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b, \
+ k30, k31, k32, k33, k34, k35, k37, k38, k39, k3a, k3b \
+) { \
+ { k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a, k0b }, \
+ { k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1a, k1b }, \
+ { k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2a, k2b }, \
+ { k30, k31, k32, k33, k34, k35, KC_NO, k37, k38, k39, k3a, k3b } \
+}
diff --git a/keyboards/plum47/readme.md b/keyboards/plum47/readme.md
new file mode 100644
index 000000000000..f954c788e156
--- /dev/null
+++ b/keyboards/plum47/readme.md
@@ -0,0 +1,19 @@
+# plum47
+
+
+
+*A short description of the keyboard/project*
+
+* Keyboard Maintainer: [Masayuki Takagi](https://github.com/yourusername)
+* 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 plum47:default
+
+Flashing example for this keyboard:
+
+ make plum47: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).
diff --git a/keyboards/plum47/rules.mk b/keyboards/plum47/rules.mk
new file mode 100644
index 000000000000..fd76a52478f7
--- /dev/null
+++ b/keyboards/plum47/rules.mk
@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = caterina
+
+# Build Options
+# change yes to no to disable
+#
+BOOTMAGIC_ENABLE = lite # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes # Mouse keys
+EXTRAKEY_ENABLE = yes # Audio control and System control
+CONSOLE_ENABLE = no # Console for debug
+COMMAND_ENABLE = no # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no # USB Nkey Rollover
+BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no # Enable Bluetooth
+AUDIO_ENABLE = no # Audio output