Discussion on the issue:
(English) https://ja.wikipedia.org/wiki/Wikipedia:Help_for_Non-Japanese_Speakers#Wiki_labels_.26_Revision_Scoring_as_a_Service_for_Japanese_Wikipedia

(Japanese) https://ja.wikipedia.org/wiki/Wikipedia:%E4%BA%95%E6%88%B8%E7%AB%AF/subj/Help_for_Non-Japanese_Speakers%E3%81%AB%E6%8A%95%E9%99%8D%E3%81%95%E3%82%8C%E3%81%9F%E8%8B%B1%E8%AA%9E%E7%89%88%E3%82%A6%E3%82%A3%E3%82%AD%E3%83%9A%E3%83%87%E3%82%A3%E3%82%A2%E3%81%AE%E3%82%A4%E3%82%BF%E3%82%BA%E3%83%A9%E7%B7%A8%E9%9B%86%E8%87%AA%E5%8B%95%E6%A4%9C%E5%87%BA%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0%E3%81%AE%E7%B4%B9%E4%BB%8B

Translation of UI:
https://meta.wikimedia.org/w/index.php?title=Wiki_labels%2FInterface_translation&type=revision&diff=14581888&oldid=14519379

Translation of Edit quality forms:
https://meta.wikimedia.org/w/index.php?title=Wiki_labels%2FInterface_translation%2FEdit_quality&type=revision&diff=14581958&oldid=14519388

Wikilabels landing page:
https://ja.wikipedia.org/wiki/Wikipedia:%E4%BB%98%E7%AE%8B%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0

Trusted users are abusefilter, bot, bureaucrat, checkuser, eliminator, interface-editor, oversight, rollbacker, sysop per https://meta.wikimedia.org/w/index.php?title=User_talk%3A%E3%81%A8%E3%81%82%E3%82%8B%E7%99%BD%E3%81%84%E7%8C%AB&type=revision&diff=14593784&oldid=13823753