This is really good.
This is Aji, Japanese jack fish but not ordinary one.
It is called Seki Aji. Seki is the brand name. It is from Ohita prefecture. Seki is just between Kyushu island and shikoku island.
This are is very narrow and sea srtream is very fast.
It means can get high quality fish.
Seki Aji and Seki Saba are famous from this area.
Of course the price is more expensive than ordinary aji but taste is much better than that.