Tokyo, Jan. 5 (Jiji Press)--A bluefin tuna fetched a record 510.3 million yen in New Year's tuna auction at the Toyosu market in Tokyo on Monday morning. The closely followed annual event began at 5:10 a.m. with the sound of a bell. Of some 250 tunas up for auction, the 243-kilogram bluefin from Oma, Aomori Prefecture, sold at the highest price, at 2.1 million yen per kg, far higher than th...