+### 5. HHKB
+[keymap_hhkb.c](keymap_hhkb.c) emulates original HHKB layers.
+#### 5.0: Default layer
+ ,-----------------------------------------------------------.
+ |Esc| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =| \| `|
+ |-----------------------------------------------------------|
+ |Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]|Bspc |
+ |-----------------------------------------------------------|
+ |Ctrl | A| S| D| F| G| H| J| K| L|Fn3| '|Return |
+ |-----------------------------------------------------------|
+ |Shift | Z| X| C| V| B| N| M| ,| .| /|Shift |Fn |
+ |-----------------------------------------------------------|
+ | |Gui |Alt | Space | |Alt |Gui | |
+ `-----------------------------------------------------------'
+#### 5.1: HHKB Fn layer
+ ,-----------------------------------------------------------.
+ |Pwr| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Ins|Del|
+ |-----------------------------------------------------------|
+ |Caps | | | | | | | |Psc|Slk|Pus|Up | | |
+ |-----------------------------------------------------------|
+ | |VoD|VoU|Mut|Ejc| | *| /|Hom|PgU|Lef|Rig|Enter |
+ |-----------------------------------------------------------|
+ | | | | | | | +| -|End|PgD|Dow| | |
+ |-----------------------------------------------------------|
+ | | | | | | | | |
+ `-----------------------------------------------------------'
+