Nanja Monja is a teppanyaki restaurant in Shinjuku Sanchome serving monjayaki and okonomiyaki. The mentaiko, mochi, and cheese monja and the seafood okonomiyaki are cooked by customers on table griddles. Seating includes sunken kotatsu and horigotatsu floors where shoes are removed, plus counter seats, and orders are placed by QR code. The dining room is loud enough that speaking loudly is necessary.