Buddhism, which spread from its native India to China, becoming molded by Chinese society into a new form of 'Chinese Buddhism', was later spread to Japan. The history of Buddhism in Japan can be roughly divided into three periods, namely the Nara period (710-794), the Heian period (794-1185) and the post-Heian period (1185 onwards). Although it is possible that Buddhism was known to the Japanese previously, the "official" introduction of Buddhism to Japan is dated to 552 in Nihon Shoki (otherwise 538 according to the History of Gangōji monastery),[7] when Seong of Baekje sent a mission to Nara including some Buddhist monks or nuns, together with an image of Buddha, and numbers of sutras to introduce Buddhism.
Buddhism
Due to Japan's close proximity to China Japans written language and aspects of culture and dress were heavily influenced
Japanese culture was blended with Chinese and Korean culture. Chinese adopted budhism from India which was later spread to Japan. Korean influence can be seen in Japanese paintings and architecture.
it explains why japan's culture reflects a Chinese influence.
buddism
They moved japans capital to the city of Nara
the fact it is on an island.
China .
Shinto
Japans willingness to adopt more of china's culture
it contained elements that were already part of japanese culture
My Nuts Get Huger & the soldiers have relationships with 2000 chinese women
China and Korea mostly. China by obvious reasons (Written language and other customs such as the lunar calender, etc. Japanese culture is hugely based off of Chinas) and Korea had other influences as well (Brought over technologies such as paper printing, pottery and art, etc). It's important to note, in the earlier days Korea had more of a direct impact whereas China had more of an indirect one (When Koreans introduced their culture, they also introduced Chinese.) Soon, Japan was able to have relations with China directly