Satoru Shiga is a professional wrestler best known for his time in Big Japan Pro Wrestling under the ring name Shadow WX. He debuted in 1995 in IWA Japan and moved to Big Japan in 1996, where he became a protege of Mr. Pogo and won the BJW Deathmatch Heavyweight Championship four times. His last match for BJW came on October 3, 2013, losing a Fluorescent Boards, Lemon and Salt Death Match to his longtime rival, The W*inger.