I'm not a Japanese typist, but ever since I learned how to customize ergo/ortho keyboards with QMK/ZMK, a right thumb shift key is always present on my layout.

I'm not a Japanese typist, but ever since I learned how to customize ergo/ortho keyboards with QMK/ZMK, a right thumb shift key is always present on my layout. It gives me Shift plus Caps Lock with just one key.