Kyoto court cooking, 1830s — Honda Miso's founder Tanbaya Mosuke, a Tanba sake brewer, codified the high-rice-koji, low-salt formula for the imperial court (the 'Saikyo' name itself came only after the Meiji Restoration, when Kyoto was dubbed the 'Western Capital' against Tokyo). Spread through Kansai when refined sugar became affordable in late Meiji.
Saikyo Miso the brand still operates from Kyoto's Nishijin district, founded 1830 by Honda Yoshibei. A black-cod marinated 48 hours in Saikyo white miso is the dish that made Nobu Matsuhisa internationally famous in the 1990s.
Smooth pale-yellow paste, no chunks, sweetness up front from the rice koji, salt finishing soft. Mild enough to eat raw on cucumber. Used in saikyo-yaki marinade for fish, in nuta dressings, and as the base of dengaku miso.
Rice-koji-to-soybean ratio is 2:1 (vs 1:1 for red miso); the Aspergillus oryzae enzymes flood with glucose before salt-tolerant yeasts can fully convert it. Short ferment at 25-30°C halts Maillard browning, keeping the paste pale.
Variations
Saikyo (西京, Kyoto, sweetest, lowest salt), Shinshu shiro (信州白, Nagano, slightly drier), Sanuki shiro (讃岐, Kagawa, leans tan from longer ferment), Fuchu (府中, Hiroshima, almost-white but saltier).
On the Palate
Where White Miso sits in the Japanese flavor cloud
Ingredients
Serves 8How it's made
4 steps · 10 min active + 30 days 5 min waiting
- 12880 min
Cook 1 kg short-grain rice + inoculate with koji mold; ferment 2 days at 30 °C.
Watch outHold the koji warm and even so the mold enzymes flood the rice with sugar — too cool and the ferment stalls.
- 210 min
Mix rice koji with 500 g cooked soybeans + 60 g salt (6%) + 200 ml water.
- 340320 min
Pack into cedar tub; press weight on top; ferment cool 2–8 weeks.
Watch outFerment somewhere cool so it stays pale — heat kicks off browning and you lose the white in white miso.
- 45 min
Mature paste is pale beige; gentle and sweet; jar.
Watch outIt's ready when the paste reads pale beige and tastes gently sweet, not deep brown or sharp.
