1 Decisive Battle") was an annual program made by Monster9, the same company that produces series such as Kinniku Banzuke and SASUKE and broadcast on TBS TV.
Competitors take on a series of physical and mental events, where better performance is rewarded with more points.
In 2010, Monster9 held a "Monster Box Special" rather than traditional format, 50 competitors were invited, including several members of Muscle Musical and three SASUKE All-Stars.
Eventually, they went to created Sports Danshi Grand Prix as the reboot of predecessor show with Wataru Fujita assumed as director and actress Alisa Mizuki served as commentator of this show.
Notable international competitors include American decathletes Paul Terek and Bryan Clay, and Philadelphia Phillies outfielder Shane Victorino.