んじゃう
uchikonja u

Godan Verb (mu)
Godan Verb (u)

The completive aspect (contracted form) - indicates completion or regret of 打ち込む

1. To be engrossed in; To get carried away with; To devote oneself to; To plunge into; (Regretfully) to have done (something) too much

Completed Action
Colloquial
Sports
Martial Arts
Go