Shishamo is a fish found naturally only in Japan, with its habitat limited to the Pacific coast of Hokkaido. Because it is caught during a short seasonal fishing period in autumn and early winter, fresh Shishamo is a particularly special local delicacy.
Shishamo is a Japanese native fish found in coastal waters of Hokkaido at depths of less than approximately 120 meters. Unlike many fish that remain in the sea throughout their lives, Shishamo migrate in large groups into specific rivers to spawn.
The fish found along the Hidaka coast and those around the Kushiro and Tokachi coasts have also been confirmed to be genetically distinct populations, reflecting the unique local nature of Hokkaido’s Shishamo fisheries.
Shishamo reaches its peak season from approximately mid-October to late November, when the fish gather and migrate upstream for spawning.
Important spawning rivers include the Mukawa River in the Iburi region, the Saru River in Hidaka, the Tokachi River, and several rivers in the Kushiro area, including the Charo, Akan, Shin-Kushiro, Bekanbeushi, and Oboro Diversion Rivers.
Because Shishamo fishing is concentrated in a relatively short period, autumn is the ideal time to experience this distinctive Hokkaido seafood. The fish is particularly appreciated for its seasonal character and connection to the rivers and coastal waters of eastern Hokkaido.
The most common way to enjoy Shishamo is to grill dried Shishamo. The entire fish can be eaten, including the bones, and females with roe are especially popular for their rich, satisfying flavor.
For travelers visiting Hokkaido in autumn, grilled Shishamo offers a simple but memorable taste of a fish that is deeply connected to the natural environment of northern Japan.
October and November