This is cod roe, as simple as that!
It is said that this is a specialty from Fukuoka but most is actually coming from Hokkaido and prepared/seasoned in Fukuoka. This product does not travel abroad so please enjoy while in Japan
With rice and nori at breakfast
With cream and pasta at lunch
My tip, the clearer the better, the darker the more industrial and salty
Wanna taste? Go to Isetan depachika and admire the choice! You can taste there, it is cheap and excellent