Nobody knows the exact age of how old Ueshiba was when he "created" Aikido. The term "Aikido" became the official name of the art in 1942 but was called Aikibudo prior to that time. Ueshiba was said to have developed the art in between the 1920's and 30's. That would put his age in the 30's to 40's. He was a very devout student of Martial Arts and took his time developing Aikido.
Moriteru Ueshiba is 60 years old (birthdate: April 2, 1951).
Aikido has no age limit, as its founder meant it to be more a spiritual path than a martial art. Morihei Ueshiba saw his Aikido as merely the natural evolution of Bushido; Bushido in Japan's Sengoku (Warring States) period, was concerned with killing as quickly, efficiently and cold bloodedly as humanly possible, Bushdio from the 20th century onward, Ueshiba argued, should be concerned with putting the skills and meditation of martial arts towards creating better citizens. According to expert opinion that may be found in virtually any martial arts book, in order to succeed in a fight or self defense situation, an individual needs impecable fitness, in addition to a calm mind, and in addition to that competent training. A fight, is as bad a situation as you can be in, and martial arts holds the theory that you need to remain calm so that you can think. The ability to stay calm in the heat of a fight, transfers to an ability to remain calm when life gets bad, that is one of the ways in which martial arts transfer to "the real world." Aikido's aim is total inner peace due to its influences by Shinto and Zen, thus, it has no real age limit unless of course you are an old man or woman very close to death.
You can join Aikido from 4 years old and you can join Juniors from 10.
It would be difficult to identify a single person as the founder of karate. Most of the traditional styles trace their lineage through Sokon "Bushi" Matsumura (c.1798-1890).Each style has a specific 'founder' that broke away from the original. Some claimed to have something better, some that they are still teaching the original and that everyone else has changed it.
Judo can be translated directly as "the gentle way." Ju is a direct translation of Gentle. Aikido is also often referred to as the gentle way as well. They focus on grappling instead of kicking and punching, you are supposed to use momentum to try to throw the opponent onto the ground. It is meant for defense only.
The Old Fashioned Way - song - was created in 1973.
Grow Old with Me was created in 1984.
Old Major was created in 1945.
The Old Lady was created in 1932.
The Shock of the Old was created in 2006.
These Old Shades was created in 1926.
Old Tombstone was created in 1805.