Buddhism was introduced to Japan in the 6th century CE via a statue of Buddha gifted by the kingdom of Baekje in Korea. This statue, though damaged over time due to natural disasters, is considered the oldest Buddhist sculpture in Japan. The document then discusses the Five Dhyani Buddhas in Vajrayana Buddhism, which represent different qualities or aspects of Buddha. It provides images and descriptions of each Buddha - Vairocana, Akshobhya, Amitabha, Ratnasambhava, and Amoghasiddhi - including their symbolic colors, qualities, and religious significance. URLs are listed for additional information on the topics.