Procedure
- staging the change
- enter the commit message in Japanese in the input form
- predictive conversion will make it impossible to enter characters
Preview

Version
Version: 1.52.0-insider
Commit: 5e350b1
Date: 2020-12-04T10:16:29.391Z
Electron: 9.3.5
Chrome: 83.0.4103.122
Node.js: 12.14.1
V8: 8.3.110.13-electron.0
OS: Darwin x64 19.6.0