The Art of Making ‘Japan Blue’; Founded in 1914, Nogawa Senshoku Kogyo Continues Making Dye for Popular Color Using Traditional Techniques

By Hidenori Sato / Yomiuri Shimbun Staff Writer
16:05 JST,
December 15, 2025
HANYU, Saitama — Thirteen jars of indigo dye are lined up beneath the factory floor. Each jar contains dye that has undergone a different fermentation period and varies in dyeing strength.
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