For the Japanese, the Onna-Musha replaces their crossbowman, and it is in the “W” spot in the archery range, but the hotkey defaults to “R” because it uses “Horse Archer / Mangudai” hotkey instead of the “Crossbowman / Arbaletrier” hotkey.
This means you can’t use same hotkeys when switching between normal civs and Japanese, since Japanese also have a Yumi Bannerman which is properly in the “R” hotkey spot.
This also affects the upgrade for Onna-Musha, which uses the “Upgrade Horse Archer / Mangudai” hotkey instead of the “Upgrade Crossbowman / Arbaletrier” hotkey.
Build: 9.1.176.0