Masuzushi: Toyama's Iconic Pressed Trout Sushi, Explained

Masuzushi is made by layering thinly sliced, vinegar-marinated trout over vinegared rice inside a round wooden mold called a wappa, then pressing it flat and wrapping the whole disc in bamboo leaves. It bears little resemblance to the nigiri or maki sushi most visitors picture, coming instead as a firm, sliceable round meant to be cut like a cake rather than picked up piece by piece.

The dish is generally traced back to the Edo period, when a version was reportedly presented as a gift to the shogunate. Today it's Toyama's defining train-station bento and souvenir, sold whole in flat round boxes. Because it's pressed and vinegared rather than made with raw fish alone, it holds up reasonably well without refrigeration for a few hours, making it a practical choice for travel.