I'll post a few suggestions so that you can vote. Feel free to add your own suggestion.
I've been thinking it would be nice to have establish some guideline how we should format quotations from Japanese, especially but not limited to books/papers.
As always, this shouldn't be a rule but a guideline or recommendation. Peole can do what they want. But if you don't know what to do; or if editing a post for other reasons, it's nice to have default or guideline.
We don't need academic standards here and this is not about if or what details (author, title, year, publisher &c.) you should give, but how to format it if you choose to do so.
The formatting guide has got a section on quoting Japanese, but it only mentions that block quotes
> should be preferred.
Below you can find a few suggestions for voting. Or add your own suggestions if you don't like mine.