Mirin — The Architecture of Japanese Sweetness
Mikawa (Aichi Prefecture), Japan — commercial production from Edo period
Hon-mirin (true mirin) is a fermented rice wine sweetener with 14% ABV, produced by fermenting steamed mochi rice with rice koji and shochu over 40–60 days until the koji enzymes convert the rice starches to sugars, creating a naturally sweet, golden syrup with complex flavour. It is not simply 'sweet sake' — its flavour is umami-sweet with caramelisable sugars that create the characteristic glazing and caramelisation (Maillard reaction) in tare, teriyaki, and nitsuke. Three tiers exist: hon-mirin (true, naturally fermented, ~14% ABV, legally classified as alcohol); mirin-fu chomiryo (mirin-style seasoning, 1% ABV or less, no alcohol tax, less complex); and shio-mirin (with added salt to avoid alcohol classification). Hon-mirin is the only professional choice; the others are convenience products that lack the depth and caramelisation properties of genuine mirin.