Oka Naosaburo Shoten Co., Ltd. is a historic soy sauce brewery founded in 1787. The company uses traditional wooden vats for natural fermentation, a process passed down through generations. They specialize in soy sauces like Tamari and other premium varieties. The company's flagship product, 'Japan's No.1 Soy Sauce,' reflects their dedication to maintaining authentic Japanese brewing methods. The soy sauce is naturally fermented for 1-2 years, creating rich umami flavors, highly regarded in Japan and abroad.