Tcho, which began in San Francisco and moved to Berkeley, is being bought by a 100-year-old food company in Japan. Tcho, which began in San Francisco and moved to Berkeley, is being bought by a 100-year-old food company in Japan. Kathryn Pulliam packs chocolate in the back of Tcho chocolate in San Francisco on September 27th 2013. Kathryn Pulliam packs chocolate in the back of Tcho chocolate in San Francisco on September 27th 2013.