The Health Benefits of Suntory Kuro (Black) Oolong Tea

Oolong is a semi-oxidized tea that originated in China, and in Japan, it is as popular as Japanese green teas, such as Sen-cha and Hoji-cha. In fact, each convenience store chain in Japan is definitely selling oolong tea PET bottles alongside other green tea PET bottles.

When it comes to the history of oolong tea in Japan, in 1981, the Japanese drinks company, Ito-en invented canned oolong tea for the first time in the world, and in December of that year, Suntory began to sell their canned oolong tea.

Suntory Oolong Tea and Kuro Oolong Tea

Today, a number of Japanese companies are manufacturing their own oolong tea PET bottles, but Suntory’s one is especially popular and comes in 2 types, that is, normal oolong tea and Kuro oolong tea.

Suntory Kuro Oolong Tea 

Suntory Kuro (Black) Oolong Tea

Suntory “Kuro (黒 : black)” oolong tea is a government-approved food for specified health uses, known as “Tokuho (トクホ)”, which was introduced in 2006. Unlike normal oolong tea, it contains plenty of Oolong Tea Polymerized Polyphenols (OTPP) including a type of oolong tea polyphenol called oolong homobisflavan B.

Health Benefits 

OTPP has an action that inhibits absorption of fat in food and suppresses the increase in neutral fat in blood after a meal, as well as excreting fat from body as twice as usual.

Dose and How to Drink

Suntory Black Oolong Tea How to Drink and Dose

To have the health benefits, you need to drink one PET bottle of the black oolong tea (350 ml) during a meal, at most twice in a day.

Ingredients and Nutrition Facts

Suntory Kuro Oolong Tea Ingredients and Nutrition Facts

Made from oolong tea leaves produced in China’s Fujian Province, Suntory Kuro Oolong Tea contains about 10 mg of caffeine, about 20 mg of potassium, less than 10 mg of phosphorus per 100 ml, and 70 mg of OTPP, 0.07 g of salt equivalents per 350 ml.


Suntory Oolong Tea and Black Oolong Tea

As you can see in the photo, the Kuro oolong tea is darker in color than the Suntory’s regular oolong tea. (which is why it is called black oolong). As for the taste, there is no big difference between them, and both are smooth, taste fine. But if I had to say, I feel the black oolong tea is somewhat more intense in taste.

(Reference Page: Wikipedia サントリー黒烏龍茶 )


Hi, I'm Tomo, a Japanese blogger living in Niigata Prefecture, Japan. For the purpose of enriching your life, I would like to introduce things about Japan on this blog, especially unique Japanese products, cooking recipes, cultures, and facts and trivia.

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