This tuna caught in Japan is worth savouring: It cost about three-quarters of a million dollars.

A bluefin tuna caught off northeastern Japan fetched a record 56.49 million yen (about $746,797 Cdn) on Thursday in the first auction of the year at Tokyo's Tsukiji fish market.

The price for the 269-kilogram tuna beat last year's record of 32.49 million yen (about $429,500 today).

The price translates to 210,000 yen per kilogram — also a record, said Yutaka Hasegawa, a Tsukiji market official.

Though the fish is undoubtedly high quality, the price has more to do with the celebratory atmosphere that surrounds the first auction of the year.

The winning bidder, Kiyoshi Kimura, president of Kiyomura Co., which operates the Sushi-Zanmai restaurant chain, said he wanted to give Japan a boost after last year's devastating earthquake and tsunami.

"Japan has been through a lot the last year due to the disaster," a beaming Kimura told AP Television News. "Japan needs to hang in there. So I tried hard myself and ended up buying the most expensive one."

Kimura also said he wanted to keep the fish in Japan "rather than let it get taken overseas."

Last year's bid winners were Hong Kong entrepreneur Ricky Cheng, who runs the Hong Kong-based chain Itamae Sushi, and an upscale Japanese restaurant in Tokyo's Ginza district.

This year's record tuna was caught off Oma, in Aomori prefecture and just north of the tsunami-battered coast.

'I can do nothing but smile'

Bluefin tuna is prized for its tender red meat. The best slices of fatty bluefin — called "o-toro" here — can sell for 2,000 yen (nearly $27) per piece at tony Tokyo sushi bars.

A Sushi-Zanmai shop in Tsujiki was selling fatty tuna sushi from the prized fish for 418 yen ($5.50) apiece Thursday.

"It's superb. I can do nothing but smile. I am very happy," said Kosuke Shimogawara, a 51-year-old customer, who pointed out that if sold at cost, each piece of sushi could cost as much as 8,000 yen ($106).

"It's unbelievable. President Kimura is so generous. I have to say thank you to him," he said.

Japanese eat 80 per cent of the Atlantic and Pacific bluefins caught — the most sought-after by sushi lovers. Japanese fishermen, however, face growing calls for tighter fishing rules amid declining tuna stocks worldwide.

In November 2010, the International Commission for the Conservation of Atlantic Tunas voted to cut the bluefin fishing quota in the eastern Atlantic and Mediterranean by about four per cent, from 13,500 to 12,900 tonnes annually. It also agreed on measures to try to improve enforcement of quotas on bluefin.

The decision was strongly criticized by environmental groups, which hoped to see bluefin fishing slashed or suspended.