Update Japanese translation

[IchijikuIchigo]

• Add translations for untranslated items
• Fixed a small mistake

[netlify]

✅ Deploy Preview for tiddlywiki-previews ready!

Name	Link
🔨 Latest commit	268ebb6
🔍 Latest deploy log	https://app.netlify.com/projects/tiddlywiki-previews/deploys/69551d4431ea680008bcb1cd
😎 Deploy Preview	https://deploy-preview-9542--tiddlywiki-previews.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[github-actions]

Confirmed: IchijikuIchigo has already signed the Contributor License Agreement (see contributing.md)

[github-actions]

⚠️ Change Note Status

This PR appears to contain code changes but doesn't include a change note.

Please add a change note by creating a .tid file in editions/tw5.com/tiddlers/releasenotes/<version>/

📚 Documentation: Release Notes and Changes

💡 Note: If this is a documentation-only change, you can ignore this message.

[Jermolene]

Thank you @IchijikuIchigo, I appreciate translation improvements very much.