From Game Developer Research Institute
- Return of the Invaders (under subcontract with UPL?) (Taito)
UPL is said to have developed Return of the Invaders, but some digging reveals the following strings: 
Programed by NAKAKUMA AKIRA V 1.0 (85.3.15)
NOBUO KODERA AKIRA NAKAKUMA HIKARU KASAHARA COMIX LTD. 1985.
Kodera and Nakakuma previously worked on Pengo. Nakakuma later started Soft Machine.