Aikido is a defensive martial art that uses throws and joint locks. Tomiki Kenji, the founder of Shodokan Aikido, introduced randori, or freestyle format into Aikido practice. This book sets out to explain the need for the scope of randori in Aikido practice. The book explains the historical and philosophical principles behind randori, and the physiological principles of Aikido. It illustrates fundamental training and practice methods, describes the role of kata and randori in Aikido practice and guides the player through the shodokan system and the grading syllabus.