Shingon Buddhism is a school of Mahayana Buddhism that originated in Japan in the 9th century. It was founded by Kūkai, also known as Kōbō-Daishi, who studied esoteric Buddhism in China and brought its teachings to Japan.

Shingon Buddhism is known for its emphasis on the use of mantras, mudras, and visualizations in its practices. These techniques are believed to allow practitioners to access the innermost essence of reality and attain enlightenment. It also incorporates elements of other philosophical and religious traditions, such as Taoism and Shinto, into its teachings. This syncretism is reflected in the central role that the concept of "mikkyō," or "the wondrous teachings," plays in Shingon Buddhism. It places a strong emphasis on the attainment of enlightenment in this lifetime, and its practitioners seek to cultivate the qualities of wisdom and compassion through their spiritual practices. Shingon Buddhism is also known for its emphasis on the role of the guru, or teacher, in guiding practitioners on the path to enlightenment.