How to say he's doing in-depth research on ancient history. in Japanese
1)
彼彼(kare) (ok) that , or something understood without naming it directly)/that person/over there/hey/eh?/thatはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sigh古代史古代史(kodaishi) (n) ancient historyのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question分野分野(bunya) (n) field/sphere/realm/division/branchでで(de) (prt) indicates location of action/at/in/indicates time of action/indicates means of action/cause of effect/by/and then/so/indicates continuing action/ indicates certainty, emphasis, etc.突っ込んno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbだだ(da) (aux) be/is/indicates past or completed action/indicates light imperative研究研究(kenkyuu) (n,vs) study/research/investigationをを(wo) (prt) indicates direct object of action/indicates subject of causative expression/indicates an area traversed/indicates time over which action takes place/indicates point of departure or separation of action/indicates object of desire, like, hate,しし(shi) (num) 10^24/septillion/quadrillionているている(teiru) (v) an "ing" form of the previous verb。。(。) Japanese period "."
