In terms of training style, Jujitsu employs momentum concepts based on the opponent's force, balance, and leverage. In contrast, Aikido emphasizes endurance, flexibility, and controlled relaxation. Pushing and extending motions are more common than pulling and constricting ones. Although both arts include some striking techniques, their primary purpose is to accomplish a physical or spiritual awakening not lasting longer than the contact with the opponent. Jujitsu was developed in Japan while Aikido came from Japan. Both systems involve the use of restraint and leverage to defeat an opponent by controlling his ability to fight back. However, they differ significantly in their teaching methodology and art history. Aikido is a modern-day adaptation of old jujitsu techniques designed to deal with violence using only minimum force. It is commonly believed that jujitsu originated in China while aikido came from Japan. In fact, both systems have been practiced in Asia since the 16th century. Aikido is typically done in a dojo (school) consisting of one large open space with a room for practicing techniques away from other people. There may be several aikido schools in one city, but each one has its own sensei (teacher). Each school may have its own rules regarding attire, behavior, and so on. Jujitsu is usually done in a private home or similar setting involving only the teacher and student.