What is the name of pressed sushi originating from Osaka?

Oshizushi is the pressed sushi style originating from Osaka.

Oshizushi, also called hakozushi or box sushi, is made by placing sushi rice and toppings in a mold and pressing them into a compact block. The finished sushi is then removed from the mold and cut into neat rectangular pieces. This distinguishes it from nigiri, which is shaped by hand, and maki, which is rolled in seaweed.

The style is strongly associated with Osaka, where it developed as a regional form of sushi. Pressing helped create uniform pieces and made it possible to prepare sushi in advance. Traditional versions often feature cooked, marinated, or cured seafood rather than relying exclusively on raw fish.

Oshizushi also belongs to the broader historical transition from fermented sushi toward vinegar-seasoned sushi. Its molded shape is not an indication that it is a modern invention; pressed sushi has deep roots in Japanese food culture. A familiar example is battera, an Osaka-style pressed sushi traditionally associated with mackerel.