Breakdown of oji wa kodomotachi to kouen de asobimasu.
はwa
topic particle
とto
and; or; with
でde
location particle (for events and actions)
遊ぶasobu
to play (a game)
Nihon-shiki romanizationwatasi ha tyuugoku kara kimasita
Hepburn romanizationwatashi wa chuugoku kara kimashita
