text: After joining GBH, he captured the International Wrestling Grand Prix (IWGP) Junior Heavyweight Championship from Tiger Mask on September 21, 2008, on NJPW's Circuit 2008 New Japan Generation tour. He subsequently lost it back to Tiger Mask on NJPW's Wrestle Kingdom III show in Tokyo on January 4, 2009. After losing the championship, Low Ki made several appearances for Hustle.
  Return to TNA (2006–2008)
  At Lockdown, Christopher Daniels's mystery opponent was revealed to be the returning Low Ki, who wrestled under the name of Senshi (Japanese for "warrior" or "soldier"). Following Lockdown, Senshi was not seen in action for several weeks. Instead, he was built up with a series of vignettes hyping his background, training, and desire to dominate the X Division once more, hinting at the possibility of challenging the X Division Champion, the undefeated Samoa Joe.
  Senshi defeated Alex Shelley, Jay Lethal, Petey Williams, Shark Boy, and Sonjay Dutt at Slammiversary to become the number one contender to the X Division Championship. Senshi went on to become X Division Champion again on the June 22, 2006, episode of Impact!, defeating Joe and Dutt after he pinned Dutt. He remained undefeated for six months, successfully defending the X Division Championship against Kazarian at Victory Road, Jay Lethal and Petey Williams in a three-way match at Hard Justice, and Chris Sabin at No Surrender, before losing the title to Sabin in October at Bound for Glory.