diff --git a/hhkb/keymap.c b/hhkb/keymap.c
index 137ab7def..d6acf4595 100644
--- a/hhkb/keymap.c
+++ b/hhkb/keymap.c
@@ -42,9 +42,9 @@ static const uint8_t PROGMEM fn_layer[] = {
     2,              // Fn2
     3,              // Fn3
     4,              // Fn4
-    0,              // Fn5
+    5,              // Fn5
     0,              // Fn6
-    1               // Fn7
+    0               // Fn7
 };
 
 // Assign Fn key(0-7) to a keycode sent when release Fn key without use of the layer.
@@ -54,8 +54,8 @@ static const uint8_t PROGMEM fn_keycode[] = {
     KB_NO,          // Fn1
     KB_SLSH,        // Fn2
     KB_SCLN,        // Fn3
-    KB_SPC,         // Fn4
-    KB_NO,          // Fn5
+    KB_RGUI,        // Fn4
+    KB_SPC,         // Fn5
     KB_NO,          // Fn6
     KB_NO           // Fn7
 };
@@ -71,14 +71,14 @@ static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
      * |-----------------------------------------------------------|
      * |Shift   |  Z|  X|  C|  V|  B|  N|  M|  ,|  .|Fn2|Shift |Fn1|
      * `-----------------------------------------------------------'
-     *       |Gui|Alt  |Fn4                    |Alt  |Fn7|
+     *       |Gui|Alt  |Fn5                    |Alt  |Fn4|
      *       `-------------------------------------------'
      */
     KEYMAP(KB_ESC, KB_1,   KB_2,   KB_3,   KB_4,   KB_5,   KB_6,   KB_7,   KB_8,   KB_9,   KB_0,   KB_MINS,KB_EQL, KB_BSLS,KB_GRV, \
            KB_TAB, KB_Q,   KB_W,   KB_E,   KB_R,   KB_T,   KB_Y,   KB_U,   KB_I,   KB_O,   KB_P,   KB_LBRC,KB_RBRC,KB_BSPC, \
            KB_LCTL,KB_A,   KB_S,   KB_D,   KB_F,   KB_G,   KB_H,   KB_J,   KB_K,   KB_L,   KB_FN3, KB_QUOT,KB_ENT, \
            KB_LSFT,KB_Z,   KB_X,   KB_C,   KB_V,   KB_B,   KB_N,   KB_M,   KB_COMM,KB_DOT, KB_FN2, KB_RSFT,KB_FN1, \
-           KB_LGUI,KB_LALT,KB_FN4, KB_RALT,KB_RGUI),
+           KB_LGUI,KB_LALT,KB_FN5, KB_RALT,KB_FN4),
 
     /* Layer 1: HHKB mode (HHKB Fn)
      * ,-----------------------------------------------------------.
@@ -155,7 +155,27 @@ static const uint8_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
            KB_BSPC,KB_P,   KB_O,   KB_I,   KB_U,   KB_Y,   KB_T,   KB_R,   KB_E,   KB_W,   KB_Q,   KB_NO,  KB_NO,  KB_TAB, \
            KB_LCTL,KB_SCLN,KB_L,   KB_K,   KB_J,   KB_H,   KB_G,   KB_F,   KB_D,   KB_S,   KB_A,   KB_RCTL,KB_RCTL, \
            KB_LSFT,KB_SLSH,KB_DOT, KB_COMM,KB_M,   KB_N,   KB_B,   KB_V,   KB_C,   KB_X,   KB_Z,   KB_RSFT,KB_NO, \
-           KB_LGUI,KB_LALT,KB_FN4, KB_RALT,KB_RGUI)
+           KB_LGUI,KB_LALT,KB_SPC, KB_RALT,KB_FN4),
+
+    /* Layer 5: Mouse mode
+     * ,-----------------------------------------------------------.
+     * |Esc| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Ins|Del|
+     * |-----------------------------------------------------------|
+     * |Tab  |MwL|MwU|McU|MwD|MwR|MwL|MwD|MwU|MwR|   |   |   |Backs|
+     * |-----------------------------------------------------------|
+     * |Contro|   |McL|McD|McR|   |McL|McD|McU|McR|Mb1|   |Return  |
+     * |-----------------------------------------------------------|
+     * |Shift   |Mb4|Mb5|Mb1|Mb2|Mb3|Mb2|Mb1|Mb4|Mb5|   |Shift |   |
+     * `-----------------------------------------------------------'
+     *      |Gui |Alt  |xxxxxxxxxxxxxxxxxxxxxxx|Alt  |Gui|
+     *      `--------------------------------------------'
+     * Mc: Mouse Cursor / Mb: Mouse Button / Mw: Mouse Wheel 
+     */
+    KEYMAP(KB_ESC, KB_F1,  KB_F2,  KB_F3,  KB_F4,  KB_F5,  KB_F6,  KB_F7,  KB_F8,  KB_F9,  KB_F10, KB_F11, KB_F12, KB_INS, KB_DEL, \
+           KB_TAB, KB_WH_L,KB_WH_U,KB_MS_U,KB_WH_D,KB_WH_R,KB_WH_L,KB_WH_D,KB_WH_U,KB_WH_R,KB_NO,  KB_NO,  KB_NO,  KB_BSPC, \
+           KB_LCTL,KB_NO,  KB_MS_L,KB_MS_D,KB_MS_R,KB_NO,  KB_MS_L,KB_MS_D,KB_MS_U,KB_MS_R,KB_BTN1,KB_NO,  KB_ENT, \
+           KB_LSFT,KB_BTN4,KB_BTN5,KB_BTN1,KB_BTN2,KB_BTN3,KB_BTN2,KB_BTN1,KB_BTN4,KB_BTN5,KB_NO,  KB_RSFT,KB_NO, \
+           KB_LGUI,KB_LALT,KB_FN5, KB_RALT,KB_RGUI),
 };
 
 
diff --git a/layer.c b/layer.c
index 0fe06a456..90314e442 100644
--- a/layer.c
+++ b/layer.c
@@ -106,8 +106,8 @@ void layer_switching(uint8_t fn_bits)
                         // send only Fn key first
                         host_swap_keyboard_report();
                         host_clear_keyboard_report();
-                        host_add_code(keymap_fn_keycode(_fn_to_send));   // TODO: do all Fn keys
                         host_set_mods(last_mods);
+                        host_add_code(keymap_fn_keycode(_fn_to_send));   // TODO: do all Fn keys
                         host_send_keyboard_report();
                         host_swap_keyboard_report();
                         sent_fn |= _fn_to_send;
@@ -152,8 +152,8 @@ void layer_switching(uint8_t fn_bits)
                     // send only Fn key first
                     host_swap_keyboard_report();
                     host_clear_keyboard_report();
-                    host_add_code(keymap_fn_keycode(fn_changed));   // TODO: do all Fn keys
                     host_set_mods(last_mods);
+                    host_add_code(keymap_fn_keycode(fn_changed));   // TODO: do all Fn keys
                     host_send_keyboard_report();
                     host_swap_keyboard_report();
                     sent_fn |= fn_changed;