Seibu Seimen, founded in 1902, is the oldest cotton manufacturer still in existence in Toyohama, the town of cotton. The company’s policy of “never cheating” because of the invisibility of the futon’s contents led to the company’s predecessors to say, “If it’s Seibu Seimen’s cotton, you can be sure of it. They do not sell any self-service products, and you can receive a thorough follow-up and service both before and after you buy.