Перевод с японского на английский: 難題
Словарь: main
難題
名詞
2 Job, Labor, assignment, chore, composition, issue, matter, paper, problem, project, report, subject, task, theme, topic, trouble, undertaking.
3 Job, adversity, difficulty, hang-up, hard knocks, hard time, hardship, hitch, hot potato, hurt, problem, rough sledding, rub, snag, suffering, trouble.