Seigo Tachibana (born August 1, 1997) is a Japanese professional wrestler currently working for Pro-Wrestling UPTOWN. He is also known for his appearances in All Japan Pro-Wrestling (AJPW), where he is a one-time World Junior Heavyweight Champion and two-time Gaora TV Champion, and WRESTLE-1, where he wrestled under the ring names Masao Hanabatake and O Hanabatakemasa.