Sanei Kosan Company was founded in 1965 in Saga by the grandfather of the current president. Saga Prefecture is the largest barley-producing region in Japan, which is why the company focuses on the production of products derived from this plant, including mugicha, an infusion of roasted barley seeds. Far from limiting itself to this single field, Sanei Kosan also produces several other teas and infusions that require in-depth mastery of roasting techniques, such as genmaicha, a tea made from green tea leaves and roasted rice grains, or oolong tea. In addition to strictly adhering to HACCP standards, the company ensures the uniformity of its products during production using numerous measuring instruments. In the interest of authenticity, these instruments have remained the same since the company's founding.