A marine products processor in Ibaraki Prefecture, originally founded as Saito Suisan in 1950. Specializes in tsukudani (simmered preserves) production, boasting an annual output of 200 tons (approximately 10% of Ibaraki Prefecture's tsukudani marine processing volume). Directly distributes 40 varieties of OEM-manufactured tsukudani to 53 wholesale markets nationwide. Received the Prefectural Governor's Award in 2021. Accommodates orders from small lots.

Founded in 1916 (Taisho 5), a long-established manufacturer with over 100 years of history specializing in tsukudani and eel, traditional products of Kasumigaura. OEM manufacturing is specialized in nori tsukudani. Adopts safe manufacturing methods incorporating HACCP principles. Accepts orders from a minimum of 20kg.