JP Ready is a free experimental Godot 4 editor plugin for pre-translation Japanese UI checks. It exercises eight practical Japanese strings in Label and Button controls in the open scene or text-format scenes, then reports layout warnings for visual review. The package also includes a 100-entry Japanese game UI phrase corpus for manual testing.

It runs locally in the editor without an API account or network service. It is not a translator and does not prove that an exported game is correct. This preview does not verify missing glyphs, exact Japanese line breaking, runtime-generated UI, or exported-build behavior. Test unfamiliar projects in a copy because custom @tool scripts may run during scene instantiation.

Tested headlessly on macOS with Godot 4.7.2. Code and Japanese test text were created with AI assistance, reviewed by the author, and smoke-tested with Godot. Licensed under MIT. Feedback about missed control or scene patterns is welcome.