Since 1902, Yamaki Jozo has produced soy sauce and miso following centuries-old methods without using additives and preservatives. The products are manufactured using over 70 huge 100-year old cedar barrels. Unlike many companies these days who use imported ingredients for their organically labeled products to keep costs low, Yamaki Jozo uses only selected Japan-grown organic ingredients, which represent 0.005% of the soy sauce market and less than 4% for miso market in Japan, in order to preserve the real traditional flavour and personalised relationship with ingredient producers.