Aishocho town, Shiga prefecture, Japan, May 31 2017 - Near Marunaka Shoyu, a 200 year old soy sauce production company, provider of 3 stars chefs all around the world. The process has been mostly unchanged since 200 years and no machinery is used to produce the soy sauce. The best products are processed 3 years before being sold.
At Yamabiko Yusui, the source of the water used to produce the soy sauce. Clean natural water is one of the most important ingredient in the process.