Prince Tsushinkogyo Co. Ltd.  (Prince Telecommunication and Engineering) was founded in 1950  in Nagoya, Japan. They concentrated on making tuners and solid state musical instrument amplifiers. The company began to use the Arion brand name and in 1980 and began making guitar effects pedals. The company's fortunes declined in the 1990s and by 1997 Arion was sold to Ueno Kaihatsu Center Ltd., who continued making the effects pedals and tuners (now in Sri Lanka), but discontinued the amplifiers.

Source: Arion website (8 April 2018)