GHCジュニアヘビー級王座
Following his loss of the tag title, Kenta returned to competing in singles competition by defeating Bryan Danielson for his second GHC Junior Heavyweight Championship, which led to a match with Marufuji, who had won the World Junior Heavyweight Championship, to attempt to unify the titles; the match ended in a sixty-minute draw, keeping the titles in the hands of their respective holder, while gaining favorable reviews for their efforts by the media with some claiming it to be a "Match of the Year". Kenta lost the title in February 2009 to rival in their interpromotional rivalry with another member of the GPWA in the Kensuke Office, Katsuhiko Nakajima, only to win it back in the next month. In October, Kobayashi was forced to vacate the title after suffering a knee injury, which would keep him sidelined for over seven months.