Pentaceros japonicus, the Japanese armorhead or Japanese boarfish, is a species of armorhead native to the western Pacific Ocean from southern Japan south to New Zealand and Australia.

It occurs at depths from 100 to 830 m (330 to 2,720 ft).

It can reach a length of 25 cm (9.8 in).

It is a commercially important species and can be found in the aquarium trade.

This Acropomatiformes-related article is a stub.