question (e.g. on a test); problem

problem (e.g. societal, political); question; issue; subject (e.g. of research); case; matter

question (i.e. doubt)

public discussion; controversy

trouble; problem; inconvenience; difficulty

Common noun

topic; subject

Nouns which may take the genitive case particle 'no'

much talked about; topical; in the news; hot

no problem; all right; not an issue; unobjectionable

subject; theme; issue; matter

homework; assignment

task; challenge; problem; question

homework; assignment

pending issue; unresolved problem; open question

main topic; main subject; main issue; main question

this subject

matter of time; question of time

to be in the news; to be talked about; to become a popular topic of conversation; to become the talk of the town; to become topical

Usu. after -masu stem or volitional form of verb

(doing) as one pleases; to one's heart's content; letting (something) go unchecked; leaving uncontrolled; leaving (something) to take its own course

to get to the main subject; to move on to the main topic; to get down to business