Miho Ninomiya(二宮 美穂,Ninomiya Miho, born August 22, 1975 in Kikuchi District, Kumamoto) is a female Japanesejudoka. She started Judo at the age of 14. She won All-Japan judo championships 2 times （1997 - 1998）. She has also won silver and bronze medals at the 1997 and 1999 World Judo Championships. However, she was defeated at the Olympic trials so she could not participate in the 2000 Olympics.