Look for it in your Asian market - there are many similar products, most of which have fish eggs in them. We don't like those! Go for this one - it's the best!
It says it has seaweed in it, yikes! Even after seven years of living in Japan, I still can't eat anything from the sea, even though the Japanese tried their best to convert me. I'm sure it's delicious, but I would have to pass ;-).