It is believed in the Edo period, as many as 1,500 general households were engaged in indigo dyeing, and twenty-five out of 360 tradesmen's houses were Koya (dye shop).
江戸時代には藍染めをする一般家庭の件数は1500近くもあったともいわれ、町屋360軒のうち25軒が紺屋であったとされる。