
Quick answer — Tetsuo Sakaguchi voices The Dream Merchant in xxxHOLiC◆Kei, Rokujoji in Black Jack, Tsunekichi in Doubutsu no Mori and 1 more characters.
Tetsuo Sakaguchi voices The Dream Merchant (xxxHOLiC◆Kei), Rokujoji (Black Jack), Tsunekichi (Doubutsu no Mori), Remiel (Tales of Symphonia: The Animation - Sylvarant Arc).
The Dream Merchant is voiced in Japanese by Tetsuo Sakaguchi.