Can you rephrase that, please?
If you're asking, did Kawamori work on every Macross series, the answer is "no", since he didn't work on Macross II. http://macross.anime.net/production/animat...gain/index.html
If you're asking, is Kawamori the only creator to get a cameo in a Macross series, I think the answer is "no". He does appear in a couple shots of the first episode of SDF Macross, as well as in a shot in DYRL. But there is also a minor character in episode 31 based somewhat on Matsuzaki Kenichi, and Minmay's manager in episode 15 is supposedly based on Mikimoto. See http://www.animeigo.com/Liner/MACROSS.t I also seem to recall that the manager's name is somehow a pun on Mikimoto's name, although I forget where I saw that.
Yeah a cameo is what I meant.