Nitto Seimo Co., Ltd. manufactures and sells knotless nets in Japan. Its products include trap nets, purse seine nets, fish farming nets, trawl nets, and laver cultivation nets, as well as onshore-related items such as animal damage protection and sports nets. The company also offers knotless mesh, knotless net, synthetic fiber, and knotted meshwork. Founded in 1910, it is headquartered in Tokyo, Japan.