Kudos to soy sauce brewery Horikawaya Nomura, located in Gobo City, Wakayama Prefecture, because they have been making their soy sauce for over 300 years without ever upgrading with new technology. Most, if not all, shoyu breweries have ungraded to cooking with natural gas. The only upgrade has been electricity which is used for the lights. Everything is heated by wood fire, including boiling the soy beans, warming the koji room and toasting the wheat. Having perfected their methods over the centuries, Horikawaya Nomura produces what we believe is one of the world’s best soy sauces.