Modified JA translations after human review

[pikurasa]

Some more work is needed. Review notes will be shared.

[github-actions]

🧪 Jest Test Results

✅ All Jest tests passed! This PR is ready to merge.

Coverage: Statements: 49.12% | Branches: 40.56% | Functions: 53.32% | Lines: 49.54%
Master Coverage: Statements: 49.11% | Branches: 40.49% | Functions: 53.32% | Lines: 49.52%

[pikurasa]

Here are my notes, as I was working through the review:
2026-06-13-review-notes.txt

Most important for @walterbender to look at are questions labeled "English" or "Non-translation question".

If I left something labeled "autotranslate" it's because I had a bigger question, and couldn't get to a good enough guess.

There are some things I'd want to take a second look at for consistency, but what's in there is prob "good enough" for now.

[walterbender]

@pikurasa I will rerun the conversion to Kana for you to review based on these new translations.