Nagoya Kishimen Flat Udon and Hitsumabushi

Hatcho miso production in Okazaki (8 chō, approximately 1km, from Okazaki Castle) dates to the early 14th century and was a provision for the warrior class; Tokugawa Ieyasu (founder of the Edo shogunate) was born in Okazaki and reportedly fuelled on hatcho miso; the miso is traditionally fermented in enormous cedar vats (each holds 6 tonnes of miso) under river stone weight pressure for 2–3 years; only two producers, Kakukyu and Maruya Hatcho Miso, are certified producers of authentic Hatcho miso

Nagoya (Aichi Prefecture) possesses Japan's most idiosyncratic regional food culture — a thick-palated, intensely flavoured, unapologetically sweet-heavy cuisine that is either devotedly loved or strongly disliked by Japanese people from other regions. The defining elements: hatcho miso (八丁味噌 — an extremely dark, deeply earthy miso made exclusively from soybeans without rice or barley, fermented 2+ years in massive wooden vats in Okazaki, Aichi); miso katsu (breaded pork cutlet served with a thick hatcho miso sauce rather than the Worcestershire-based tonkatsu sauce used everywhere else in Japan); hitsumabushi (ひつまぶし — eel rice served in a wooden lacquer bucket, eaten in three ways: as-is, with condiments, then poured over with dashi for ochazuke finish); kishimen (wide, flat udon eaten with hatcho miso-based sauce); and tebasaki (chicken wings marinated and grilled with a sweet-salty tare). The city's name has become a compound food identity 'Nagoya-meshi' — the term Japanese people use to describe the specifically Nagoya flavour register. The hatcho miso is the key differentiator: its 2+ year fermentation produces amino acids and Maillard-type browning products at concentrations beyond any other miso type, creating a flavour that is simultaneously the most intensely umami and most bitter-dark miso in existence.

Hatcho miso's flavour is the most extreme point in the miso spectrum: 2+ years of soybean-only fermentation concentrates every amino acid, produces melanoidins from Maillard reactions in the paste itself, and develops a specific bitter-dark richness that no other fermentation method produces; in miso katsu, this intensity is balanced by the fried pork's fat and the sweet additions to the tare — the balance point between 'complex dark intensity' and 'acceptable bitterness' is the defining flavour challenge of Nagoya cuisine