I’ve added a fancy Kana-only Japanese layout: https://source.puri.sm/Librem5/squeekboard/merge_requests/208
Japanese users, please test, and, even better, make fixes! The file can be downloaded here: https://source.puri.sm/Librem5/squeekboard/raw/06f99b85f0529679984c89c199ad39b6a3261466/data/keyboards/jp+kana.yaml?inline=false
All contributors: that keyboard might be interesting to you if you want to learn what tricks can be pulled off with your own keyboards. It’s quite different from all the others so far!