Here's why:
* Buddhism's Arrival: Buddhism was introduced to Japan from China in the 6th century CE. It quickly gained favor with the ruling class and spread rapidly throughout the country.
* Cultural Transmission: Buddhism was not just a religion but a complete cultural system that included art, literature, philosophy, architecture, and social practices. As Japan adopted Buddhism, it also absorbed many of these cultural elements from China.
* Art and Architecture: Buddhist temples, statues, and paintings became central features of Japanese art and architecture. Many elements, like pagodas, were directly inspired by Chinese models.
* Literature and Philosophy: Buddhist scriptures and teachings influenced Japanese literature, poetry, and philosophical thought.
* Social Structures: Buddhism also played a role in shaping Japanese social structures, impacting ideas about family, morality, and the afterlife.
While there were other factors like trade and political interaction, the arrival of Buddhism was a cornerstone of Chinese influence on traditional Japanese culture. It brought with it a comprehensive cultural framework that deeply impacted Japanese society, art, and worldview.