Gakuto Mikumo (三雲 岳斗, Mikumo Gakuto, born 1970) is a Japanese writer of mystery and science fiction light novels from the Oita Prefecture in Japan. He studied the English language at Sophia University, where he graduated. In 1998 Mikumo won silver in the fifth Dengeki Novel Prize with his debut novel Gehenna. He went on to win the Japan SF Rookie of the Year Award in 1999 with M.G.H., and a special prize in the Sneaker Awards in 2000 with Earth Reverse. He is also a member of the Mystery Writers of Japan and the Honkaku Mystery Writers Club of Japan. Mikumo is currently most well known for the Asura Cryin' series and the Strike the Blood series. He also wrote Metal Gear Solid Portable Ops for PSP.