research in Japanese

(uncountable, countable, _, in some dialects) Diligent inquiry or examination to seek or revise facts, principles, theories, applications, etc. (that are currently available, or that are familiar to one's self).

(countable, dated) A particular instance or piece of research.

(transitive) To search or examine with continued care; to seek diligently.

(intransitive) To make an extensive investigation into.