Update japanese translation.

[niyari]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Internationalization and localization
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

• Update japanese translation.

Other information

Quality check

Before creating this PR, have you:

• Followed the code style guideline as described in CONTRIBUTING.md
• Verified that the change work in Release build configuration
• Checked all unit tests pass

[veler]

Thank you very much! :)

[inductor]

@veler Would you mind adding me as a reviewer next time just in case, for localization? not sure if it's too much work for you but that'd be much appreciated as who started localizing this to Japanese :)

[veler]

@veler Would you mind adding me as a reviewer next time just in case, for localization? not sure if it's too much work for you but that'd be much appreciated as who started localizing this to Japanese :)

Absolutely! I can make you our main maintainer of Japanese language. Thank you very much for asking that, it's actually a great thing! :D