Shingon, also known as Esoteric Japanese Buddhism, is a form of Buddhism that originated in Japan in the 9th century. It is based on the teachings of the Indian monk Kukai, also known as Kobo Daishi, who traveled to China to study Esoteric Buddhism and brought it back to Japan. Shingon is known for its emphasis on ritual practices, mantras, and visualizations as a means to attain enlightenment.

There are several specific temples and sites associated with Shingon, which hold great significance for its followers. One of the most important sites is Mount Koya, also known as Koyasan, located in Wakayama Prefecture in Japan. This mountain is considered to be the spiritual center of Shingon Buddhism and is the headquarters of the Shingon sect. It is believed that Kukai founded the first Shingon temple, Kongobuji, on this mountain in the 9th century. Today, there are over 100 temples on Mount Koya, including the famous Okunoin Temple, which is the mausoleum of Kukai.

Another significant site associated with Shingon is the Toji Temple in Kyoto. This temple was founded by Kukai in the 9th century and is considered to be one of the oldest Shingon temples in Japan. It is home to the famous five-story pagoda, which is the tallest wooden tower in Japan and a designated national treasure.

The Daigoji Temple in Kyoto is another important site for Shingon followers. It was founded in the 9th century by Kukai and is known for its beautiful cherry blossom gardens. The temple is also home to the Shingon Esoteric Buddhist Museum, which displays artifacts and teachings related to Shingon Buddhism.

In addition to these major sites, there are many other temples and shrines throughout Japan that are associated with Shingon. These include the Koyasan Danjo Garan, which is a complex of temples and halls on Mount Koya, and the Nachi Falls, which is considered a sacred site in Shingon Buddhism.

Overall, these temples and sites play a significant role in the practice and history of Shingon Buddhism. They serve as places of worship, meditation, and pilgrimage for followers of this esoteric form of Japanese Buddhism. Visiting these sites can provide a deeper understanding and appreciation for the beliefs and practices of Shingon.