Breakdown of kare wa sanposhite, ofisu ni kaerimashita.
はwa
topic particle
にni
at; on; in; to; for [indirect object particle]
彼kare
he
帰るkaeru
to return
Nihon-shiki romanizationwatasi ha tyuugoku kara kimasita
Hepburn romanizationwatashi wa chuugoku kara kimashita
