Kaga-fu and Fu Wheat Gluten Preparations

China — Buddhist dietary tradition transmitted to Japan through Zen monastery food culture during Kamakura period (13th century); Kanazawa Kaga-fu artistic tradition developed under Maeda clan patronage from 16th century

Fu (wheat gluten, from Chinese fu, literally 'bran')—produced by washing starch from wheat flour until only the elastic gluten protein network remains—is one of Japan's most creative protein ingredients, used extensively in Buddhist shojin cuisine (as the primary protein substitute), kaiseki (for textural contrast in soups and simmered dishes), and everyday home cooking. Japanese fu exists in two fundamental forms: nama-fu (raw fresh wheat gluten, formed from pure gluten dough immediately before use) and yaki-fu (dried toasted fu in various shapes). Within these categories exist extraordinary speciality varieties: Kaga-fu from Kanazawa—created in specific ornamental shapes (flowers, wheels, autumn leaves) by mixing coloured sweet potato, spinach, or other vegetable purée into the gluten dough; warabi-fu (bracken fern starch mixed with gluten for softer texture); and age-fu (deep-fried gluten that creates hollow, sponge-like pockets). Fu's key culinary property is its extraordinary liquid-absorption capacity: when simmered in dashi, fu absorbs and holds flavour like a soft sponge, delivering concentrated broth with each bite.

Neutral wheat protein carrier — the flavour is entirely from absorbed dashi or broth; texture ranges from light sponge (nama-fu) to firm chewy (yaki-fu) to hollow-absorbent (age-fu); Kaga-fu colour is visual expression of seasonal identity