The OPRT is an organization established to prevent the over-exploitation of tunas and utilize them in a sustainable manner.
Please support us so that people can continue to enjoy eating delicious tunas forever.
Click here for becoming a supporting member
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What's new?

10/2/2024
Price of Tunas and Trend in the total stock of major tuna species in Japan (fresh and frozen) have been updated.
Price of Tunas (August 2024)
Trend in the total stock of major tuna species in Japan (frozen) (2 years, 5 years and 10 years) (July 2024)
9/25/2024
Distribution of YouTube videos to increase consumption of natural and frozen tuna.
9/4/2024
Price of Tunas and Trend in the total stock of major tuna species in Japan (fresh and frozen) have been updated.
Price of Tunas (July 2024)
Trend in the total stock of major tuna species in Japan (frozen) (2 years, 5 years and 10 years) (June 2024)
8/1/2024
Price of Tunas and Trend in the total stock of major tuna species in Japan (fresh and frozen) have been updated.
Price of Tunas (June 2024)
Trend in the total stock of major tuna species in Japan (frozen) (2 years, 5 years and 10 years) (May 2024)
7/26/2024
A new article has been added to Jiro's Critical Eye (Importance of understanding fishery dynamics)
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About
Sustainable use of tunasHistory of the OPRT
and its activities.
About
Tuna long line fisheriesSummary of tuna longline fishing.
About TunasSpecies of tuna, living areas, nutrition, etc.
About the OPRTArticles of Association, Membership, business plan.
The OPRT is calling for supporting MembersPlease support us so that people can continue to enjoy eating delicious tunas forever.