If you are using this keyboard (https://keyman.com/keyboards/japanese), be informed that its has only a web version which is available on Keyman Web. Try it here: https://keymanweb.com/?_ga=2.34079201.1768649545.1627520456-30305726.1574652282#ja,Keyboard_japanese. If you have further question, go to https://community.software.sil.org/c/keyman/19.