[CHz]

Another ex-SNK dudester joined GE-ON-DAN: Yasuhiro Naka (中康洋). His profile unfortunately doesn't list any aliases (yet), but it does list quite a few specific games, so let's take a look at the staffs of those games, taken from Dag's I must say again excellent list:

• Art of Fighting 2: YAMAPY 1, JOJOUHA KITAPY, MARIKO, YASSUN
• Savage Reign: Jojouha Kitapy, Mariko, Yassun
• The Last Blade: YASSUN, TATE_NORIO, BROTHER-HIGE, ZOE, OKAN
• The Last Blade 2: YASSUN^^V, JOJOUHA KITAPY, KYO-CHAN, ZOE
• Fatal Fury 3: J.KITAPY, SHIMIZM, MITUO, MACKY, YASSUN
• Garou: Mark of the Wolves: ACKEY, YASSUN, HORI-HORI, OKAN, Q-JIROU
• Fatal Fury Wild Ambition: Brother-Hige, Jojouha Kitapy, YAMAPY-1, MIWA, HORI-HORI, TATE-NORIO, OKAN, SHA-V
• Samurai Shodown Warriors Rage: Kyo-chan, Macky, ASSHY, BERO-OU, Mari Mari, Brother-Hige, Yamapy-1, Tate Norio

Yassun worked on six of those games, and Yasuhiro Naka -> Yassun, so I think that's probably him. That name doesn't appear in the final two games, though, so he might have another alias.