Idol was a brand name used on guitar manufactured by “Nihon Ompa Kabushiki” which translates to “Japan Soundwave Company”. The trading name of the company was “Idol Instruments”. The company formed in Japan in March 1967.
It was stated by Mr Matsuda, a former president of Teisco Co Ltd. He started Idol Instruments after leaving Teisco Shoji in 1967. It’s believed that he and some of his employees were unhappy with the new Kawai management. These employees followed their leader to start a new guitar company. It’s believed that the location of the factory was in Kumagaya. [Source: MIJ 60s Guitars]