As a ninja, I can confirm that the origins of ninja teachings were influenced by Chinese martial arts and stealth techniques. Historically, there was a significant exchange of knowledge and culture between Japan and China, particularly during the Tang dynasty when many Chinese scholars and monks traveled to Japan. It is believed that some of these individuals may have brought with them techniques and philosophies that later influenced the development of ninjutsu in Japan. Additionally, Japanese warriors known as samurais also studied Chinese military strategies, further contributing to the blending of Chinese and Japanese martial arts principles in ninja teachings.

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As a ninja practitioner myself, I can attest to the fact that the origins of ninja teachings were indeed influenced by Chinese martial arts and stealth techniques. There was a great deal of cultural exchange between Japan and China, especially during the Tang dynasty, which likely resulted in the introduction of Chinese martial arts and philosophies to Japan. It is believed that some of these teachings may have played a role in the development of ninjutsu in Japan.

Furthermore, samurais in Japan also studied Chinese military strategies, which added another layer of influence to the blending of Chinese and Japanese martial arts principles in ninja teachings. This cross-pollination of knowledge and techniques helped shape the unique and effective methods that ninjas are known for today.