Update Japanese translation

[Hima-Zinn]

@tkusano, @dolciss, @oboenikui, @noritada, @middlingphys, @hibiki, @reindex-ot, @haoyayoi, @vyv03354

The changes are shown below, please check if they are correct.

• Translations of the sections added at 0625a91
  • The parts enclosed in "{}" were brought as is because I did not know which parts were translatable. If you know of any translation that can be done, please comment on it in the review.

[tkusano]

Sorry for not mentioning the Japanese team. I've already updated Japanese message translation in #3886

[Hima-Zinn]

Oh, OK.
This PR is closed and moving tkusano's PR.