Union Denshi Kougyou
From Game Developer Research Institute
ユニオン電子工業?
"Union Denshi Kogyo Company" is listed as the copyright claimant and author on US copyright records pertaining to the following games, so take that for what it's worth:
Research Methods: Online resources
Arcade
- Kamikaze / Astro Invader (Leijac/Stern)
- End, The (Konami/Stern)