Hatcho Miso: Aichi's Dark Soybean Miso Explained
Hatcho miso (八丁味噌) is the dark soybean miso of Aichi, central Japan: reddish-brown, dense and deeply savoury, with an astringent edge no other miso has. It is a bean miso, made almost entirely from soybeans, and it is the backbone of Nagoya's cooking.
This guide explains what Hatcho miso is, how Aichi's climate shaped it, the dishes it belongs to, and how to use it. It sits inside our Fermented Masterclass.
Our Hatcho miso: Maruya Original Hatcho Miso, 300g, from Okazaki, Aichi, aged for over two years in cedarwood barrels weighted with river stones.
What Is Hatcho Miso?
Many miso are made with rice koji, like Marukome's red miso. Aichi's miso is mame miso, bean miso. Japan's Ministry of Agriculture (MAFF) explains that the soybeans themselves are grown with koji mould to make soybean koji (mame-kōji), then fermented and aged for at least a year, often two or three. The result has a rich body, some acidity and a distinctive astringency.
The name comes from a place. MAFF records that Hatchō village, now Hatchō-chō in Okazaki, lay eight chō, about 870 metres, from Okazaki Castle, birthplace of Tokugawa Ieyasu, where the Tōkaidō road crossed the Yahagi River; the crossing is said to have made soybeans and salt easy to obtain.
MAFF registered Hatcho Miso as Geographical Indication No. 49 in December 2017, describing it as reddish-brown and deep in colour, with moderate acidity, umami and a bitter, astringent taste unlike other miso. The scope of that registration has since been disputed, so read the label of any Hatcho miso you buy.
Source: MAFF GI register entry No. 49 (Hatcho Miso). Facts extracted and reworded.
Why Aichi Makes Bean Miso
The GI record explains the link to place. Aichi's hot, humid climate made koji-making prone to spoiling, so about 200 years ago a method of making miso balls from soybeans and salt became established there. The heat also speeds the breakdown of the soybeans as the miso ages.
Source: MAFF GI register entry No. 49 (Hatcho Miso). Facts extracted and reworded.
Hatcho Miso Dishes
- Miso-nikomi udon. Udon simmered in a Hatcho miso broth in an earthenware pot, with chicken, deep-fried tofu, kamaboko and an egg; said to have been served in Ichinomiya restaurants in the Meiji era. The noodles are made with flour and water only, no salt, so they stay firm while they simmer.
- Nimiso. Root vegetables, konnyaku and deep-fried tofu simmered in red miso, mirin and sugar. MAFF notes it is made in a big batch and reheated, so the flavour deepens.
MAFF's nimiso recipe, for four: daikon, carrot, burdock, taro, leek, konnyaku and deep-fried tofu simmered in 600ml of dashi with 100g of red miso, 4 tablespoons of sugar and 4 tablespoons of mirin, finished with shichimi.
Source: MAFF Uchi no Kyōdo Ryōri pages for Aichi nimiso and miso-nikomi udon. Facts extracted and reworded.
How to Use Hatcho Miso
- Miso soup. Dissolve it gradually into the soup through a sieve; it holds its flavour better than lighter miso when simmered, but do not boil it for long.
- Stews and braises. Its dense, savoury depth suits long-cooked dishes.
- Marinades and glazes. A base for meat and fish to be grilled or roasted.
It is strong and salty: use less than you would of a pale miso. Once opened, refrigerate it and press the surface smooth to limit contact with air.
Popular Products
Three to start with: the Hatcho miso, an everyday rice-koji red miso to compare, and the dashi to go under them.
Maruya Original Hatcho Miso, 300g
From Okazaki, Aichi. Soybeans, water, sea salt and a little roasted barley, so it contains gluten.
Marukome Red Miso Paste (Aka Miso), 1kg
An everyday red miso made with rice koji in Nagano. Also in 20kg.
Frequently Asked Questions
What is Hatcho miso?
A dark bean miso from Aichi, made almost entirely from soybeans and aged for a long time.
What is the difference between Hatcho miso and red miso?
Hatcho is a bean miso made with soybean koji; many red miso, such as Marukome's, are made with rice koji.
What does Hatcho miso taste like?
Deep and savoury, with moderate acidity and a bitter, astringent edge.
Is Hatcho miso gluten free?
Not always: ours contains a little roasted barley. Check the label.
What is miso-nikomi udon?
Udon simmered in Hatcho miso broth in a clay pot, an Aichi dish.
Where to Buy Hatcho Miso in the UK
Our Hatcho miso is Maruya Original Hatcho Miso, 300g, from Okazaki, Aichi, aged for over two years in cedarwood barrels weighted with river stones.
For more, browse the Fermented Masterclass. Read next: Udon guide · Mochi and ozōni
Sources: Ministry of Agriculture, Forestry and Fisheries of Japan: GI register entry No. 49 (Hatcho Miso); Uchi no Kyōdo Ryōri pages for Aichi nimiso and miso-nikomi udon; retrieved 5 November 2026; Maruya and Marukome product specifications. Facts extracted and reworded, not reproduced.
