
Quick answer — Yuusuke Oguri voices Clockmon in Digimon Tamers, Christian Strand in Ashita no Nadja, Thomas in Hana Yori Dango (Boys Over Flowers).
Yuusuke Oguri voices Clockmon (Digimon Tamers), Christian Strand (Ashita no Nadja), Thomas (Hana Yori Dango (Boys Over Flowers)).
Clockmon is voiced in Japanese by Yuusuke Oguri.