In the days when refrigerators and shrink packs did not exist, quintessential Tokyo style sweet Tsukudani was used with confidence, much appreciated, and not affected even in summer when used at room temperature in rice balls and "bento" lunch boxes.
本来の江戸前佃煮とは、冷蔵庫や真空包装のない時代に、常温で夏でもおにぎりや弁当に入れても傷まない辛口のものが安心で重宝された。