What is the difference between iaido and kendo?
Japanese Jiujitsu is Aikido's Ancestor. Other styles of Jiujitsu
are different, however the Japanese style which is the original
style is a root of Aikido. Aikido was created so that you would not
destroy your attacker, however jiujitsu is used in combat. The
Samurai used techniques that look like Aikido, however it is just a
form of Jiujitsu. What Morihei Ueshiba (the founder of Aikido) did
was take techniques that he learned from Daito Ryu Jiujitsu and
shortened them creating "Aikido". Aikido often talks about
protecting your attacker. Ultimately you have the option to protect
or destroy once you know techniques, it is up to the Aikidoka.