Fish species in Japan

Biwa salmon

ビワマス · biwamasu
Oncorhynchus masou rhodurus

Biwa salmon are endemic to Lake Biwa. Boat fishing is regulated under a seasonal approval system. A licensed, approved guide is the practical starting point; check the current rules rather than assuming open access.

Habitat and season

Lake Biwa and its tributaries; adults feed in the lake.

Recorded fishing season: Jan · Feb · Mar · Apr · May · Jun · Jul · Aug · Sep · Dec
Scientific name: Oncorhynchus masou rhodurus
Japanese name: ビワマス

Months are a broad guide, not a current catch forecast. Region, water temperature and local closures can change the season.

Fishing methods

Lake trolling for Biwa salmon

Biwa salmon fishing is managed under a specific approval system. Book an approved guide and confirm the current fishing period and retention rules before planning a trip.