Japan — red bean paste confectionery tradition since Heian period; Kyoto refinement peak
Beyond standard nerikiri, advanced Japanese wagashi technique involves multiple bean paste varieties and their distinct applications. Koshian (smooth red bean paste, strained): silky smooth, used in premium namagashi where texture refinement is paramount. Tsubuan (chunky red bean): whole beans partially crushed, retaining texture — for dorayaki, daifuku. Shiro-an (white bean paste): from white kidney beans or lima beans — base for colored nerikiri, lighter flavor than koshian. Kinton (mashed sweet potato or chestnut): for seasonal variations. The Kyoto wagashi tradition classifies bean paste quality with the same precision as French haute cuisine classifies stocks.
Clean, earthy-sweet azuki flavor — calibrated sweetness allowing bean character to dominate
{"Koshian production: cook azuki beans soft, push through fine sieve, repeat — multiple passes","Water ratio in cooking: 1:3 bean:water ratio ensures even cooking without splitting","Pressing and drying: wrap cooked strained paste in cloth, press to remove moisture","Sugar addition: add to dry pressed paste, not to wet — controls final sweetness precisely","Shiro-an from white beans: requires double-blanching to remove any bitterness","Sweetness level: premium wagashi uses less sugar than commercial — natural bean flavor primary"}
{"Boiled azuki three times (yomigaeri): third boil with fresh water for cleanest flavor","Test koshian moisture: roll between palms — if doesn't stick, moisture is correct","Tsubu-an texture: partially crush with wooden spoon after cooking — some whole beans visible","Shiro-an coloring: add drops of natural coloring (strawberry, matcha, pumpkin) for vivid nerikiri","Umeshu (plum wine) addition to red bean: slight sourness in paste counters sweetness"}
{"Insufficient straining of koshian — gritty, inconsistent texture","Adding sugar to wet paste — results in runny paste that can't be shaped","Not removing enough moisture from strained paste — soft paste cannot be molded","Using commercial red bean paste as substitute for house-made — significant quality difference"}
Japanese Wagashi Confectionery — Kyoto Wagashi Association; Tsuji Culinary documentation