text: On the December 9 episode of SmackDown!, Funaki won a cruiserweight over the top rope number one contender's battle royal which included Chavo Guerrero, Paul London, Billy Kidman, Akio, Shannon Moore and Nunzio. At Armageddon, Funaki defeated Spike Dudley to win the Cruiserweight Championship. Funaki successfully defended the title against Spike Dudley, Akio and Nunzio. His last successful title defense was against Chavo Guerrero on the February 10, 2005 episode of SmackDown!, notably held in Funaki's birth country, Japan.
  Cruiserweight Division (2005–2008)
  Funaki lost the championship to Chavo Guerrero in a six-man Cruiserweight Open match at No Way Out. At Armageddon, he lost to Jamie Noble in a match on Heat. During an interview with then Cruiserweight Champion Kid Kash on an episode of SmackDown!, Funaki was assaulted by Kash, who gave him a brainbuster onto the interview platform.
  At the Royal Rumble, Funaki faced Kid Kash in a match for the title, when he was entered into a Cruiserweight Open along with four other Cruiserweight champions, including the champion Kash. Funaki was pinned in this one fall match by then Raw superstar Gregory Helms, who won the match and title. At No Way Out, Funaki participated in a Nine Man Cruiserweight Match for the WWE Cruiserweight Championship but Helms retained the title. Since that time Funaki, would regularly team with Scotty 2 Hotty during episodes of Velocity and SmackDown!. During one such Velocity taping, however, Funaki suffered a 2nd Grade concussion, where he was unconscious for just under two minutes. Funaki would resume wrestling later that year, forming a tag team of sorts with Scotty 2 Hotty, which was mainly used to put over debuting wrestlers or tag teams.