The Founder, History and Development of Ninjutsu

The theoretical basis of Ninjutsu is the Japanese art of war from China, which was developed by practicing Taoism and ambushing in the mountains. In peacetime, due to the rise of the samurai class, the art of ambush in the mountains was developed by the samurai. In the Yuan Ping era, he learned the Yuan Yijing of ambush in the mountains, successfully applied the technology of ambush in the mountains, and completed the theory of offensive tactics. During the Southern and Northern Dynasties, Kusunoki Masashige developed defensive techniques, and at the same time.

With the progress of science and technology, Ninjutsu gradually lost. According to legend, the ancestor of Ninjutsu is Sun Tzu's Art of War, which needs to be verified by historians.

During the Warring States period, celebrities needed a lot of information about the enemy's situation to sabotage enemy cities, so Ninjutsu developed by leaps and bounds in this era. Ninjutsu has developed in the following areas: Musashi, Jiafei, Houyue, Shinano, Iga, Kaga and Jiyi. Among them, Ninjutsu of Iga and Kaga is the most developed in Japan. Iga and Kaga are both close to Beijing, and the terrain belongs to a small closed basin surrounded by mountains and obstacles. Although barren, their strategic position is very important: because they are close to central Feng Jingen. During the Warring States Period, more than 60 local tyrants (each with a maximum strength of no more than 50 people, according to China's algorithm, at best, small bandits) rose in this tiny place. Although the venue is small, the fierce competition here is beyond the imagination of outsiders. Local tyrants form false alliances with each other, secretly spy on each other, and once they seize the opportunity, they will give their opponents a merciless blow. These two bloody mountains full of cruelty and cunning have gradually evolved into the base camp for the development of Ninjutsu. Iga and Kaga's greatest contribution to the cause of ninja is to systematize the theoretical basis and skills of ninja and compile a book on ninja cultivation-Wan Ji Chuan Sea. Although the genre is different, the classic of ninjas' cultivation is Wan Ji Chuan Sea, the content of which is to teach ninjas all the theoretical basis and skill guidance on how to cultivate ninjas. The fourth generation general of Tokugawa family, Tokugawa Yasuo Okahiko (1676), for four years, Fujimori Yasuo, a Japanese hermit, combined the thoughts and martial arts essence of famous Chinese and Japanese celebrities and referred to six towers and six towers. Referring to the thought of "a hundred schools of thought contend and return to the sea" in the selected works of Zuo Du Fu, an ancient Chinese book, the book was named Wan Hai. As the title of the book shows, "Wan Ji Chuan Sea" means all rivers run into the sea, taking the essence of each family. Wan Ji Chuan Sea consists of six parts: righteousness, common sense, yin forbearance, yang forbearance, meteorology and forbearance. This book later became a must-read textbook for ninja practice. Tamia Liu and Sun Tzu's Art of War are two ancient works that have far-reaching influence on the overall development of Wan Ji Chuan Sea and Ninjutsu. It can also be seen that China's thoughts on ancient military martial arts have laid a solid theoretical foundation for the future development of Japanese Ninjutsu, which is the proof that Ninjutsu really originated in China. It can be said that "Wan Ji Chuan Sea" is a summary of Japanese learning the essence of ancient China's military and practicing metaphysics.