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Yellow Doctor Japan Co., Ltd.


Company name
Yellow Doctor Japan Co., Ltd.
Name of representative
Kazuhiro Osonoe
Year of establishment
70 million yen
Main products
Business details and awards
We import sea berries from Mongolia as an ingredient and make juice and skincare products out of them. We are a company that sells products online and to organic specialty stores in the metropolitan area. We also wholesale to companies and conduct OEM (Original equipment manufacturer) product development.
Our product design were made by Ibaraki’s design company “TRUNK Inc.” and our design was selected as one of “IBARAKI design selections” in 2018.
Our sea berry juice OEM factory is located in Koga City’s beverage company called Taiyo Ltd., making this product an all Ibaraki product from its planning, design, and production.
Our advantage is that our Mongolian staff stays at our branch in Mongolia and can communicate with local sea berry producers. This has allowed us to establish relationships of about 10 years that are built on mutual trust and that aid in smooth business.
Head office address
2-13-6 Ninomiya, Tsukuba-shi, Ibaraki
Zip code
Contact person
Osonoe, Kawamata
Phone Number

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  • Sea berry protein bar

    Rich in over 200 nutrients, these sea berry protein bars are an easy way to bring protein, iron, vitamins A, C and E and amino acids into your diet. Each bar contains the luxurious taste of sea berries and a generous 8g serving of soya protein. As it is a soya-based protein, it is suitable for vegans. Great as a nutritional supplement, or as a snack.
  • Sea berry + Yuzu

    Mongolian sea berries grown in the harsh environment of high latitude are hand-picked and combined with yuzu juice and honey to make this tasty beverage. It contains omega-7 fatty acids, known as the ‘fatty acids of youth’; omega-3, 6 and 9 fatty acids, vitamins A, C and E, iron and a wealth of more than 200 different nutrients, which cannot be made in the body.
  • Sea berry juice 100%

    A 100% juice made by carefully picking Mongolian sea berries and squeezing the juice.Includes omega- 3,6,9 fatty acids, including omega-7 fatty acids called "young fatty acids". Contains more than 200 kinds of rich nutrients including vitamins A, C, E and iron.


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