(Source 1: Vs. Clu Clu Land In Game High Score Staff Initials Scamble)
1. T.S (Takao Sawano)
2. SUG (Tadashi Sugiyama)
3. KAZ (Kazunobu Shimizu? Or Kazunobu Eri?)
4. ERI (???) (Kazunobu Eri?? Technology official linked to R&D2 and R&D3
5. A.N (Akito Nakatsuka. Composer. Also confirmed on Famicom OST.)
6. K.M (Kenji Miki. Director of most R&D2 games and worked with Sugiyama several times)
7. JIM (Kenji Miki)
8. TOM (Tomo-Chan? Which is Toshiyuki Nakamura's code name. Also worked on Devil World which is a similar engine.)
9. M.U (Masayuki Uemura. General Manager and Producer of all R&D2 games)
0. PIP (Probably nothing)
(Support: 1)
Originally speculated to be an R&D1 game. But Hirokazu Tanaka composed all of R&D1's NES games from 84-90 and he has confirmed that he did not work on this game. Meaning it came from another Nintendo group.
(Source: 3 Yukio Kaneoka and Clu Clu Land)
[http://www.vgmpf.com/Wiki/index.php?title=Clu_Clu_Land_(NES)]