Yusaku Nakaaki began illustrating Duel Masters cards for Wizards of the Coast during production of the Base Set, for which Yusaku illustrated Astrocomet Dragon, Bronze-Arm Tribe, Deadly Fighter Braid Claw, "Frei, Vizier of Air," and Terror Pit.
You can look up Astrocomet Dragon, Bronze-Arm Tribe, Deadly Fighter Braid Claw, Frei, Vizier of Air, and Terror Pit, along with every other Duel Masters card printed in English, in the Duel Masters card database, here: http://www.wizards.com/duelmasters/dmdb.asp Note that the database does not show promotional cards.