彼は日本の演劇にたいへんつうじている。

he; him; his; boyfriend

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

Japan

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

drama; theatre; theater; play

at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although

very; greatly; immense; enormous; great; serious; grave; dreadful; terrible; difficult; hard; major incident; disaster

to be open (to traffic); to lead to; to communicate (with); to flow (liquid, current); to pass; to get through to; to be understood; to be comprehended; to be honored; to be good; to be well versed in; to be well-informed; to communicate clandestinely; to keep in touch (e.g. with the enemy); to form a liaison; to be intimate; to spread widely; to disseminate