One possible name for the company that produced all these early ports and games is "micronics". BMF once noticed it was mentioned on the title screen of the Snes port of "Raiden Traid", and that game seems to have some of their trademark coding. Unfortunately it isn't 100% proof that it is their name, but I nevertheless have been going by it since.
Not much else I can really add to this thread. Kaiketsu Yanchamaru 3 (aka Kid Niki 3) is by far their greatest Famicom game. Still a bit glitchy, but its actually pretty playable, making me think Irem was more strict and threatened beat downs if they didn't sit down and learn to code the Famicom properly.