diff --git a/keyboards/yoichiro/lunakey_mini/keymaps/via/keymap.c b/keyboards/yoichiro/lunakey_mini/keymaps/via/keymap.c
new file mode 100644
index 0000000000..eeb59b4e19
--- /dev/null
+++ b/keyboards/yoichiro/lunakey_mini/keymaps/via/keymap.c
@@ -0,0 +1,81 @@
+/* Copyright 2020 Yoichiro Tanaka
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+enum layer_number {
+  _QWERTY = 0,
+  _LOWER,
+  _RAISE,
+  _ADJUST,
+};
+
+#define LOWER MO(_LOWER)
+#define RAISE MO(_RAISE)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [_QWERTY] = LAYOUT_split_3x6_4(
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   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_LCTL, 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_RSFT,
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+                              KC_LGUI, KC_LALT, LOWER,   KC_SPC,  KC_ENT,  RAISE,   KC_RALT, KC_RGUI
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+  ),
+
+  [_LOWER] = LAYOUT_split_3x6_4(
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,                      KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC,
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   KC_LCTL, _______, _______, _______, _______, _______,                   KC_LEFT, KC_DOWN, KC_UP,   KC_RIGHT,_______, _______,
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   KC_LSFT, _______, _______, _______, _______, _______,                   _______, _______, _______, _______, _______, _______,
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+                              KC_LGUI, KC_LALT, LOWER,   KC_SPC,  KC_ENT,  RAISE,   KC_RALT, KC_RGUI
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+  ),
+
+  [_RAISE] = LAYOUT_split_3x6_4(
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   KC_ESC,  KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC,                   KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC,
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   KC_LCTL, _______, _______, _______, _______, _______,                   KC_MINS, KC_EQL,  KC_LCBR, KC_RCBR, KC_PIPE, KC_GRV,
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   KC_LSFT, KC_TILD, _______, _______, _______, _______,                   KC_UNDS, KC_PLUS, KC_LBRC, KC_RBRC, KC_BSLS, KC_TILD,
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+                              KC_LGUI, KC_LALT, LOWER,   KC_SPC,  KC_ENT,  RAISE,   KC_RALT, KC_RGUI
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+  ),
+
+  [_ADJUST] = LAYOUT_split_3x6_4(
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   RESET,   _______, _______, _______, _______, _______,                   KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   RGB_TOG, RGB_HUI, RGB_SAI, RGB_VAI, _______, _______,                   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,
+//+--------+--------+--------+--------+--------+--------+                 +--------+--------+--------+--------+--------+--------+
+   RGB_MOD, RGB_HUD, RGB_SAD, RGB_VAD, _______, _______,                   _______, _______, _______, _______, _______, _______,
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+                              KC_LGUI, KC_LALT, LOWER,   KC_SPC,  KC_ENT,  RAISE,   KC_RALT, KC_RGUI
+//+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+--------+
+  )
+};
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+  return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
+}
diff --git a/keyboards/yoichiro/lunakey_mini/keymaps/via/rules.mk b/keyboards/yoichiro/lunakey_mini/keymaps/via/rules.mk
new file mode 100644
index 0000000000..89b0f22d0d
--- /dev/null
+++ b/keyboards/yoichiro/lunakey_mini/keymaps/via/rules.mk
@@ -0,0 +1,5 @@
+RGBLIGHT_ENABLE = yes        # Enable keyboard RGB Underglow
+AUDIO_ENABLE = no            # Enable Audio output
+OLED_DRIVER_ENABLE = no      # Enable OLED Display
+VIA_ENABLE = yes             # Enable VIA support
+LTO_ENABLE = yes             # CFLAGS=flto