Alexander Otsuka is a retired japanese mixed martial artist and pro wrestler who competed in the PRIDE Middleweight division. He won his last fight at Vale Tudo Fighters Mexico against Masada Masada on May 27, 2006. His ring name is a tribute to Alexander Karelin.
Otsuka competed for multiple pro wrestling organizations in his career, most recently with Antonio Inoki's Inoki Genome Federation.
Otsuka made the move from a successful professional wrestling career to mixed martial arts competition in 1995. He earned a notable victory over Vale Tudo pioneer Marco Ruas in 1998. Though Otsuka finished his career in 2006 with a dismal 4-13 record, he fought some of the toughest fighters of his era, including all-time greats Renzo Gracie, Ken Shamrock, Igor Vovchanchyn, Quinton Jackson, Wanderlei Silva, and Anderson Silva, all of whom defeated him. Otsuka was known for his toughness in the ring.