Tantric Buddhism arrived in China in the 7th century, during the Tang Dynasty. In China, this form of Buddhism is known as Mìzōng (密宗), or "Esoteric School", and "Zhenyan" (true word, Sanskrit: Mantrayana). Kūkai (AD774–835) is a major Japanese Buddhist philosopher and the founder of the Tantric Shingon (true word) school in Japan. He wrote on a wide variety of topics such as public policy, language, the arts, literature, music and religion. After studying in China under Huiguo, Kūkai brought together various elements into a cohesive philosophical system of Shingon.