Answer:
From the ancient period trade was not only used for the exchange of goods but also for religious transfusion and the spread of Buddhism across South Asia also became possible because of it.
Step-by-step explanation:
Buddhism was introduced to Japan from the East Asian trade route extended through the Korean peninsula from northern China. By the seventh century, religion has been organized with many religious institutions and priest orders. In the early Heian period (after 794) some Japanese priests brought Vajrayana Buddhist and its associated shrine of deities and sacred, mysterious practices to Japan. They learned the Chinese religion and went home to establish prominent monasteries. The cultural and religious exchange became possible because of the safety along the trade routes.