During the Heian period, in the early 9th century, two monks, Saicho and Kukai, traveled to China and on their return introduced to Japan the Tendai (or Chinese, T'ien - t'ai) sect and the Shingon sect, which was a form of Chinese Tantric Buddhism.
在平安时代，在9世纪初，两个和尚，最澄和空海，前往中国，并在他们返回日本引进的坦达第一节和第二节的真言，这是一种形式的中国密宗佛教。