Agetsuki

Well known high quality Tonkatsu restaurant in the area. LIke it a lot. The only downside is that it literally takes 30-40 minutes to be served after your order gets placed. So you need to be patient inside the restaurant as well as outside the restaurant (waiting in the line). It's still worth a shot. 

My rating: 4.5

Agetsuki
Tabelog | More photos | 050-5869-3916
Address: B1 floor, 3-2 Kagurazaka, Shinjuku-ku, Tokyo
Access: 4 minutes from Iidabashi station and UshigomeKagurazaka station
Budget: 2,000 JPY or more
Open: 11:30-15:00, 18:00-22:30 (17:30- Sat/Sun/Holiday) 
Closed: Tuesdays, 3rd Wednesdays