So I actually have a setup like this using a JIS keyboard Moom and Karabiner. JIS keyboard in QWERTY mode with left thumb key (英数) mapped to cmd and right thum

So I actually have a setup like this using a JIS keyboard Moom and Karabiner. JIS keyboard in QWERTY mode with left thumb key (英数) mapped to cmd and right thumb key (かな) as a modal key that allows me to access a custom layer with: - esdf as arrow keys - w/r as backspace/delete - a/g as home/end I also map left cmd (英数) + esdf and w/r to behave like holding ctrl on windows. i.e. move and delete by word. Used to have another mode with phone-like numpad mapping for number entry but never used it enough. I then have Moom for window managment with shortcut set to ctrl + space and then the following hot keys: - 2/3 set up for 50:50 left right split - 1/4 set up for 30:70 split - w/e/r for 30:40:30 split - q/a for top/bottom left quarter - s/d/f for even 1/3 split - t/g for 40:60 top/bottom for vertical monitors This is good enough for 99% of my cases. manytricks.com/moom/