In the Muromachi period, the polished logs produced in the Nakagawa region came to be frequently used as building material for a tea rooms and sukiya, which support the "chano yu" culture completed by SEN no Rikyu.
室町時代、中川地域の磨丸太は千利休により完成された「茶の湯」文化を支える茶室や数奇屋の建築用材として頻繁に用いられるようになった。