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Yamamotoyama (Japanese: 山本山) is a Japanese tea and seaweed manufacturer which traces its company's roots to 1690, claiming to be the oldest tea company in the world. The company began as a tea shop in Nihonbashi, and pioneered the production of gyokuro green tea in 1835. Yamamotoyama expanded to the U.S. in 1975.
References
^ "About Us". Yamamotoyama USA. Retrieved 12 August 2022.
