Ohtsuka continued his study of Jiu Jitsu for many years. During his period at Waseda University he experimented with various Jiu Jitsu styles to find their best qualities.
Hironori Ohtsuka founded Wado-Ryu, the 1st Japanese form of Karate in 1938. It was the result of many years of training in various forms of Japanese Jiu Jitsu and Okinawan Karate, as well as Aikido, developed into a single fluid, powerful, yet peaceful martial art.
It was upon learning Aikido that Ohtsuka-sensei began to form a new budo, a Way of Harmony. He would eventually blend the basics of Funakoshi's karate, the practicality of Shindo Yoshin Ryu Jiu Jitsu, and the spirituality of Aikido, as well as the natural, evasive movements of the latter two.