Hoplostethus japonicus
Hoplostethus japonicus
- Least concern
- Card rarity: Common
- Fish

The Western Pacific roughy is a species of slimehead found in the Northwest Pacific along Japan's southern coast in Sagami Bay, Suruga Bay, and the Sea of Japan. It can reach up to 12.6 cm (5.0 in) SL and its depth range is 336–605 m (1,102–1,985 ft).
Classification
- Class
- Actinopterygii
- Order
- Trachichthyiformes
- Family
- Trachichthyidae
- Genus
- Hoplostethus