Shako is a most wonderful tane. It has a grotesque appearance but such a unique and wonderful texture and flavor. It is interesting to note that it only gained popularity as a topping in Tokyo sushi shops in the 1920s or 30s. Thankfully, it is now considered a classic nimono-dane, and is served at all good sushi shops during late spring and summer. Occasionally it is served without rice, as otsumami (appetizer) as pictured here.