Only after the introduction of Buddhism into Japan, the Chinese mainland culture was root-planted in Japan. This helped the appearance of “Great Transformation and Reformation” in Japan, and thus made it develop into “a country of law and regulations.” Therefore, the influence of Buddhism on Japan is fundamental. When Buddhism was introduced into China, China had passed the first golden age of academic thoughts of Spring-Autumn and Warring States period, and was in the pioneer years of the second promising age of academic thoughts of Sui and T'ang Dynasties. Therefore, although the influence of Buddhism on China is in all aspects yet absolutely not fundamental. China and Japan developed westward all because of the military purpose, and then brought in Buddhism. In the initial stage, although Buddhism was introduced into these two countries by foreigners, ye t the formal introduction of Buddhism into Japan was initiated and planned by the government which despatched student sangha to bring in Buddhism and Chinese regulations and systems. The Chinese government never despatched positively people to the west. It was civic Buddhist sangha who went to the west out of their own faith and perseverance. As a result, what influenced China are only Buddhism and its culture and arts. The Indian regulations and systems had no influence on China. Tracing the reason, the Japanese people is a new people, a root-planted culture, emphasizing on group, and emphasizing on knowledge, yet the Chinese people is an old people, a local-originated culture, emphasing on tradition, and emphasizing on thoughts. Viewed from a certain period, the root-planted culture is promising while the local-originated culture is weak and declining. But if viewed from a long period, the root-planted culture would continue to be conditioned by the local-originated culture.