Between March 18 and 20, 2001, he took part in a tournament to determine the first ever BJW Heavyweight Champion which he won after defeating Mad Man Pondo in the quarterfinals, Wifebeater in the semifinals, and John Zandig in the finals.

[6] A week after, he competed in a tournament for the vacant BJW Deathmatch Heavyweight Championship, where he defeated Jun Kasai in the first rounds but fell short to Justice Pain in the quarterfinals.

[13][14] At the 2016 edition of the events, he scored a total of fifteen points in the only active block after going against Shinjiro Otani, Yusaku Obata, Masato Tanaka, Ryota Hama, James Raideen, Kohei Sato, Shogun Okamoto, Hayato Fujita and Buffa.

[19] At the 2014 edition, Maruyama teamed up with Daemon Ueda to defeat Atsushi Onita and Masashi Aoyagi in the first rounds and then fell short to Masato Tanaka and Takashi Sugiura in the second ones.

He began in the NJPW Super Grade Tag League IV, a tournament which took place between October 15, 1994, in which he teamed up with Masayoshi Motegi and failed to score any points after competing against the teams of El Samurai and 2 Cold Scorpio, Black Tiger and The Great Sasuke, Super Delfin and Taka Michinoku, Shinjiro Otani and Wild Pegasus, Gran Hamada and Norio Honaga, and Dean Malenko and Tokimitsu Ishizawa.