do not worry about the domestic market,,those fish come from the med.., the bellies go to tokyo and the backs come here,,most of the tuna that show up in japan are of the small size,, most med fish now are small,,,they tagged 102 fish in the med 2 years ago,,,75 lbs. roughly,,,3 fish were caught here last year,,,proves that little fish move across,, if a fish reaches 500 lbs. it has breed 3 to 5 times,,and has put back 30 to 50 mature fish back in the fisheries then why not cull that fish out,,no matter what we do people will still want to eat tuna,,,they will eat them until there is no more to eat... when dmf wanted to save the bass ,they kept increasing the size to kill until the fish had sucessfully repopulated ,, they protected those breeding fish,,,and now they are back,,,why not do the same,,, check out
www.marunaka-net.co.jp/maruna-e/pricese.htm for the latest prices and where the fish come from,,,