Korean artists and style were still heavily influential to the nascent Buddhist movement in Japan in the 7th century. While the official introduction of Buddhism in Japan did occur in the 6th century, the religion faced a hostile aristocracy and it was not until the 7th century that Buddhism became an important part of Japanese culture. The Buddha at Asuka-dera, the earliest dated Japanese image, was cast in 606 by Tori Busshi an immigrant from Korea or China. The temple where the image is housed states that Tori Busshi was from Korea. The image has been repaired numerous times so it is difficult to see if any of its 7th century stylings are preserved. Another significant work by Tori Busshi is the Sakyamuni Triad housed at the Hōryū-ji which dates to 623. Both images bear some stylistic resemblances to images from the Northern Wei (image), popular approximately a hundred years before which suggests such Northern Wei styles were preserved in Korea for their reappearance in Japan. Although there are not many analogues to the so-called Tori style that survive in Korea a stone mandorla preserved in Iksan is one such example.