Marufuji returned to the United States to wrestle for Ring of Honor on the main event of the "Best in the World" show on March 25, 2006 show in New York City, teaming with Kenta for the first time in the United States against the team of Samoa Joe and Bryan Danielson; the team of Marufuji and Kenta won after Kenta pinned Danielson, but after Marufuji tried and failed to lift Joe.
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As part of his foreign excursion to the United States, along with Kenta Kobashi and Kenta, Marufuji challenged Bryan Danielson for the ROH World Championship on December 17, 2005, in Edison, New Jersey.
The team earned only three points, one point more than Aoki's previous Nippon TV Cup league as the team only managed to defeat Kento Miyahara and Naomichi Marufuji and wrestle to a time limit draw against Eddie Edwards and Ricky Marvin.