Josh Barnett vs. Roy Nelson booked for Sept. 27 in Japan following international UFC reality show

Just don't call it The Ultimate Fighter (TUF)...

Ultimate Fighting Championship (UFC) will welcome Josh Barnett back to the Octagon after nearly two years on the sidelines. Waiting to greet him will be fellow heavyweight hurter Roy Nelson, who joins "The Warmaster" in the UFC Fight Night 78 main event on Sept. 27, 2015 inside Saitama Super Arena in Saitama, Japan.

The event airs stateside on Sept. 26 due to the discrepancy in time zones; however, it is unknown at this time if it will be a FOX Sports 1 or UFC Fight Pass event, or perhaps a combination of the two.

Before they get busy inside the cage, Barnett and Nelson will serve as coaches for the promotion's new mixed martial arts (MMA) reality show, dubbed "Road to UFC: Japan." While it films in both Las Vegas and Japan, it differs from TUF in that participants do not share a house and/or get drunk and make asses of themselves on television.

From UFC.com:

ROAD TO UFC: JAPAN will see eight MMA athletes train both in their hometowns and in Las Vegas at the TUF Gym under the supervision of coaches and UFC stars, Roy Nelson and Josh Barnett. Throughout the course of the series, match ups will be selected and fights will be scheduled to whittle the contestants down to two finalists, who will then participate in the live event at the Saitama Super Arena. The TV show will be broadcast in Japan beginning in July, airing weekly until September, and culminating at UFC FIGHT NIGHT: JAPAN.

Barnett (33-7) was last seen getting squashed by heavyweight contender Travis Browne. Prior to going limp against "Hapa," the former "Babyfaced Assassin" was the winner of two straight, including a technical knockout win over former division champion Frank Mir.

Nelson (20-11), meanwhile, is trying to slam the brakes on his two-year skid, one that saw him win just one fight out of his last five. After Mark Hunt smashed him last year in Japan, "Big Country" was pushed around by Alistair Overeem in Texas.

Must win?

No other bouts have been announced for UFC Fight Night 78, but you can expect that to change over the coming weeks, if not days.

Stay tuned.