In 1936, he adopted his wife's name upon marriage in deference to her fame as a young teacher of the Japanese harp.

He was awarded 2nd dan in judo, met Kenji Tomiki and was called up to serve in the military which he did with distinction.

In 1942 he was awarded 5th dan by Morihei Ueshiba, the founder of aikido, who used him as uke during the budo festival on the 10th anniversary of the foundation of Manchukuo.

During the 60's Hideo Ohba lead the effort for the creation of many of the koryu (old school) no kata forms from dai-ichi (first) to dai-roku (sixth) in order to work on techniques for demonstrations and other purposes (i.e. preservation, self-defense) other than randori.

After his initial organization he presented his work to Kenji Tomiki who gave advice and corrections which was added to the kata.