fix(i18n): Adding and modifying Japanese translations

[aikawa-ohno]

SUMMARY

• An unassigned translation was added.
• Fixed translation with mismatched combinations.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[github-actions]

Congrats on making your first PR and thank you for contributing to Superset! 🎉 ❤️

We hope to see you in our Slack community too! Not signed up? Use our Slack App to self-register.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.44%. Comparing base (76d897e) to head (847954f).
Report is 122 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #28487       +/-   ##
===========================================
+ Coverage   60.48%   77.44%   +16.96%     
===========================================
  Files        1931      521     -1410     
  Lines       76236    37422    -38814     
  Branches     8568        0     -8568     
===========================================
- Hits        46114    28983    -17131     
+ Misses      28017     8439    -19578     
+ Partials     2105        0     -2105     

Flag	Coverage Δ
hive	?
javascript	?
mysql	77.14% <ø> (?)
postgres	77.25% <ø> (?)
presto	?
python	77.44% <ø> (+13.96%)	⬆️
sqlite	76.70% <ø> (?)
unit	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[rusackas]

Looks like there are some linting issues, and you'll need to run the pre-commit hook for this to pass CI.

[aikawa-ohno]

Thank you for confirming.
I fixed the line endings of the .po files, which were failing the CI.