Tuna has been popular, especially as sushi, among the Japanese for many centuries. But as the popularity of Japanese food has continued to rise throughout the world, the supply of tuna is now considered to be reaching the point of depletion. This is especially true for northern bluefin tuna, which has been highly praised for its delicate taste and thus has been overfished in recent years.

Alarmed by this situation, the Japanese government started a project to cultivate bluefin tuna in 1970, inviting numerous top-level universities to attempt to offer possible solutions. But as no achievements were made during the three-year project term, the universities ended their research efforts with the exception of Kinki University.

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