Aikido, a traditional Japanese martial art, was developed in the early part of the 20th century by Morihei Ueshiba, now known as O-Sensei. As a small child, he saw his father attacked and assaulted by political opponents, and because of this injustice, devoted himself to becoming physically powerful. He studied under masters in several traditional forms of martial arts and became an expert in the styles of jujitsu, kenjitsu and sojitsu. By combining elements of these styles with his religious and political ideologies, he created the modern martial art of Aikido. However, many Aikido techniques are the result of Ueshiba's own innovation. He decided on the name Aikido in 1942, before that he called his martial art aikibudo and aikinomichi.
Following an invitation by Admiral Takeshita lsamu in 1927, Morihei moved to Tokyo. From that time, Tokyo became the base for his activities to promote his martial art. In the early 1940’s it was still only practiced by carefully chosen individuals in Japan. After WWII, Aikido was introduced to the world. In 1951 Minoru Mochizuki visited France where he introduced aikido techniques to judo students, and he was followed by Tadashi Abe in 1952. Kenji Tomiki toured with a delegation of various martial arts through 15 continental states of the US in 1953. The United Kingdom followed in 1955, etc. The International Aikido Federation (IAF) was founded in 1976. However, aikido has many styles, mostly formed by Morihei Ueshiba's major students.