Tofu production in China from Han Dynasty (2nd century BCE); introduction to Japan through Buddhist monks 8th–9th century CE; Kyoto as early Japanese tofu centre; Koya-dofu developed at Koya-san Buddhist complex
Japanese tofu (豆腐) exists in a far wider range of types than Western food culture typically acknowledges—from the soft, barely-set pudding consistency of silken (kinugoshi) tofu to the dense, chewy texture of firm (momen) tofu, with several regionally distinct specialty forms in between. The fundamental production process: soybeans are soaked, ground with water, boiled into tonyu (soy milk), then coagulated using nigari (bittern—the magnesium chloride remaining after salt crystallisation from seawater), calcium sulfate (standard commercial coagulant), or glucono delta-lactone (GDL, for silken). The coagulant type fundamentally affects flavour: nigari produces sharper, more mineral, more bean-forward tofu; calcium sulfate produces milder, creamier tofu; GDL produces the most delicate silken texture. The two primary commercial types: kinugoshi (絹ごし, silk-strained)—soy milk coagulated in the mould without pressing, producing soft, high-water-content, delicate tofu; momen (木綿, cotton-strained)—coagulated curds pressed in a cloth-lined box to expel excess whey, producing firmer, lower-moisture tofu with a more pronounced bean flavour. Regional specialty forms: Okinawa's shima-dofu (island tofu—extraordinarily firm, grillable, crumbles when squeezed, used in champuru); Koya-dofu (高野豆腐, freeze-dried tofu from Koya-san Buddhist tradition, which creates a sponge-like texture that absorbs braising liquid completely); and jidori-gara tofu (heritage strain soybean tofu from Kyoto).
Mild, slightly sweet soy-bean flavour (most prominent in fresh nigari-coagulated tofu); neutral enough to function as flavour carrier; texture is primary—the gel structure difference between types produces fundamentally different eating experiences
{"Coagulant type determines tofu character: nigari = mineral-bean flavour; calcium sulfate = mild-creamy; GDL = silken-delicate","Kinugoshi is high-water, delicate—unsuitable for frying or grilling without careful drainage; momen is firmer and tolerates direct heat applications","Soybean quality matters fundamentally—Japanese-grown daizu (大豆) soybeans from Hokkaido or Miyagi produce more flavourful tofu than imported commodity soybeans","Fresh tofu from tofu-ya (tofu artisan shops) must be kept in fresh cold water and consumed within 24–48 hours—commercial tofu in sealed water packs has extended shelf life but inferior flavour","Koya-dofu rehydration in warm dashi (60°C, 10–15 minutes) is the critical technique—hot dashi shrinks the protein structure; cold water rehydration produces a different (less absorbent) texture"}
{"Drain momen tofu overnight under a light weight in the refrigerator before making ganmodoki (tofu fritters) or tofu-based stuffings—maximum moisture removal produces the firmest, most structurally stable result","The 'tofu wa nama-mono' (tofu is a raw ingredient) principle means purchase frequency matters more than storage excellence—buy daily or every other day from a specialist producer for best results","Okinawan shima-dofu, even when available outside Okinawa, maintains its characteristic crumbliness and richness from the higher protein concentration in the production process—seek it out for authentic champuru"}
{"Using kinugoshi tofu in applications requiring firm tofu (stir-fry, agedashi with strong oil)—kinugoshi disintegrates under these conditions","Draining tofu by squeezing—squeezing breaks the gel structure; weight-pressing on a tilted board is the correct drainage method","Using cold-from-the-refrigerator tofu in miso soup—cold tofu causes the miso soup to drop temperature rapidly; brief room-temperature rest or hot-water brief soak improves service temperature maintenance"}
Tsuji Shizuo, Japanese Cooking: A Simple Art; Elizabeth Andoh, Washoku; William Shurtleff and Akiko Aoyagi, The Book of Tofu