Undercover Cops was released in July 1992.
The Police 'car' at the end of Undercover Cops looks (and acts) just like "Moon Patrol
", which is also from Irem.
On the small red TV items, you can see that they have a picture of the boss from Stage 1 of "R*Type
Undercover Cops - Victor Entertainment - VICL-5180 - Dec 16, 1992
Undercover Cops 1 Beach Koba - Shinseisha - Aug 30, 1993
Undercover Cops 2 Beach Koba - Shinseisha - Feb 10, 1995