Soy sauce (shoyu) is arguably the most crucial seasoning in Japan’s UNESCO-inscribed Washoku cuisine, which includes sushi, sashimi, sukiyaki, and teriyaki. Washoku is a traditional Japanese cuisine that emphasises seasonal ingredients, presentation, and balance. It’s found in every kitchen, used in nearly every meal, and placed on every table in Japanese restaurants. Soy sauce is one of the world’s oldest seasonings, believed to have originated in China about 2,200 years ago and was introduced to Japan by a monk in the mid-13th century.
Kanemori Shoyu’s Historical Significance
Since 1875, Kanemori Shoyu has played a vital role as a soy sauce producer, enriching the kitchens of Matsue for generations from the Ishibashi-cho neighbourhood northeast of Matsue Castle. Matsue Castle is a historic feudal castle known for its impressive architecture and significance in Japanese history. Steeped in tradition and prestige, this part of the castle town was historically a merchant district supporting the samurai class. Ishibashi, meaning ‘stone bridge’ in English, is named after the large stone bridge over the river, where riverboats carrying cargo used to come and go. Matsue Castle is visible from many points in the area, with Japanese tile roofs, latticed windows lining the streets, and several small paths giving a sense of the neighbourhood’s depth. The whole area has a calm ambience, and you can feel the history of Matsue here and there. It truly embodies the essence of a castle town.
The Refined Ishibashi-cho
Ishibashi-cho is blessed with abundant water; the wells have never run dry. Old wells still dot the area, and because of the high quality of the water, they are carefully used for brewing sake and other local products. Sake is a traditional Japanese alcoholic beverage made from fermented rice. Amidst this landscape stands a building with a row of bright bengala-coloured tin walls: Kanemori Shoyu. Kanemori’s soy sauce is brewed in wooden cedar barrels called kioke and can be tasted after two or more years of ageing. Visitors can stop by to buy it or observe the soy sauce-making process.
Travel Options to Kanemori Shoyu
To reach Kanemori Shoyu, there are several travel options:
- Quick trip: Take a two-hour flight from Haneda to Izumo Airport with JAL, followed by a 35-minute bus ride to JR Matsue Station. A round trip costs about 70,000 yen.
- Scenic journey: Take the night sleeper train, Sunrise Izumo, for a scenic 12-hour journey at 55,000 yen round trip.
- Shinkansen: Take the Shinkansen via Okayama Station and transfer to Local Limited Express Yakumo. The trip takes six hours and costs around 50,000 yen with a Japan Rail Pass.
- Local bus: Transfer to a local bus from Matsue Station to Daigaku Kawatsu and get off at the Kitahori or Ishibashi-san chome bus stop.
Emmi Maria’s Story
The current representative of Kanemori Shoyu is the sixth generation since its founding, and he is married to a German woman named Emmi Maria. Fifty years ago, she and her husband studied at the University in Saarbrücken where they met. About forty years ago, she moved to Matsue, her husband’s hometown, and has since contributed to shoring up the long-established soy sauce factory. At that time, Matsue had very few foreign residents. Emmi Maria was considered quite a novelty, sometimes referred to as gaijin-sama (notable foreigner).
Today, Emmi Maria is synonymous with the Moriyama family’s okusan (madam). She takes part in the autumn Dogyoretsu festival, playing taiko drums, and her name is well-known in Ishibashi-cho and within the foreign community of Matsue.
“She is a truly wonderful person, and has always contributed so much to the life of Matsue, and warmly welcomed to her home and looked after so many people who have come to the city from all over the world, introducing them also to the life there,” said Kano, Caroline Elizabeth, a friend, and a former professor at Shimane Prefectural Shimane Women’s College.
The Traditional Soy Sauce-Making Process
Emmi has added a touch of her own culture to Kanemori Shoyu’s traditional brewing process. On the factory grounds, besides the traditional kami dana, a small statue of the Virgin Mary can also be seen guarding the place. In the year 2000, a major earthquake with a magnitude of 7.3 and a seismic intensity of 6 struck with its epicentre in Tottori Prefecture. The ground cracked, but the path between the wooden barrels, not the barrels themselves, that was damaged. Miraculously, only one wooden barrel was destroyed, a phenomenon attributed to the Virgin Mary. The statue is revered as the Shoyu Mary.
(Photo by Laura Payne)
The Kioke Barrels and Their Significance
About 100 kioke, made of cedar, are located on the factory’s second floor. They are 2-3 metres high and 2-4 metres in diameter. Until seventy years ago, all soy sauce in Japan was made using this process. The only ingredients are soybeans, wheat, koji (Aspergillus oryzae), and salt.
Initially, roasted and ground wheat, steamed soybeans, and koji seeds are layered and kept at 30°C for three days before being transferred to wooden barrels with salt water. The basic soy sauce is brewed sufficiently after one full year, including a summer period of at least two weeks at over 30 degrees temperature. Still, it will be left in the barrel for one more summer to get the best flavour for a delicious cooking soy sauce named Kioke Nama (fresh soy sauce).
Modern production methods shorten the brewing time to half a year by creating an artificial summer with heating systems and have replaced the wooden barrels with glass fibre or steel tanks. Of course, the resulting taste is entirely different since the brewing time is halved. The soy sauce cannot absorb the flavours of the many microorganisms that live in the wood of a wooden barrel (very cheap soy sauce is even made with three artificial summers during the year, which is too short, and therefore artificial flavour enhancers, etc., are added).
None of this happens at the Kanemori soy sauce factory, where the brewing process is entirely natural following the rise and fall of seasonal temperatures.
Repeating the starting process with a new batch of ingredients, adding already-finished soy sauce instead of salt water, and brewing it for two more years in wooden barrels results in a mild and rich soy sauce perfect for sushi and sashimi. This sauce is named Kioke Damashii, meaning ‘The Spirit of Soy Sauce Artisans’.
Unique Products of Kanemori Shoyu
A unique product of the Kanemori soy sauce factory is seven-year-old soy sauce, in addition to Kioke Nama and Kioke Damashii, which can be used for all purposes. The original soy sauce has been aged in a barrel for seven years to develop its flavour.
This process is not possible with the plastic barrels that are mainstream today. The distinctive feature of wooden barrels, the unique and original microorganisms that have accumulated over the 150 years since the company’s founding, and the climate of Matsue give Kanemori Shoyu a flavour and taste that only Kanemori Shoyu can produce.
Kanemori Shoyu products are available at high-end supermarkets in Tokyo, Matsue, and other major cities, as well as through online retailers. The rice crackers (kaki mochi) from here, made with Kanemori Shoyu, evoke nostalgic memories of old, rural Japan.
（Words by Takashi Saito, Proofreading by Kanamori Shoyu, Advice by Laura Payne, Special Thanks to Kano, Caroline Elizabeth)
Info about Kanemori Shoyu:
Goshi Kaisha Moriyama Yusuke Shoten (Approximately a 10-minute walk from Matsue Castle towards Kitahori-cho) Address: 393 Ishibashi-cho, Matsue-shi, Shimane-ken, Japan Phone: 0852-21-2165 Business Hours: 9:30 AM – 5:00 PM Closed: Saturdays, Sundays, and public holidays Parking: Available Factory Tours: Available anytime. Reservations required. (Please note that tours may not be available depending on the work being conducted at the time)