Not really a big fan of sushi, but the place we go, Japanese lasagna is basically a california roll (I think, krab, avacado, rice) then layered in sloppy cream cheese and baked.
It isn't bad. Probably the most americanized sushi there is. We always order one - for people that don't really care for sushi it isn't a bad option as it is basically creamy cheesy gooiness.