They do eat California rolls in Japan although they are not as common or as popular as they are in America.
In Japan California rolls are often found in less formal settings, such as conveyor belt sushi restaurants or in some chain restaurants instead of high end sushi restaurants.
In Japan California rolls are often called uramaki or inside out sushi.
California rolls are not traditionally Japanese as they were created in the United States.
California rolls are also considered to be a type of American style sushi, which is often made using ingredients such as cucumber, imitation crab and avocado, which are not traditionally used in Japanese sushi.
California rolls are not a staple in Japan but they are found in some less formal settings.
And the California rolls are not as popular or as commonly ordered in Japan as they are in other areas of the world.
California rolls don't use raw fish like many traditional sushi rolls do, which makes it popular for people that are new to sushi and who might be hesitant to try or eat raw seafood.
The main ingredients in a California roll are imitation crab or sometimes real crab, Avocado, cucumber, Sushi rice and Nori also known as seaweed.
California rolls are also often rolled inside out, with the rice being on the outside and the nori or seaweed being on the inside.
The outer layer of rice is also frequently sprinkled with sesame seeds or fish roe such as tobiko or masago