The practice of Shingon Buddhism involves a variety of spiritual disciplines and rituals that are intended to help practitioners cultivate wisdom and compassion and eventually attain enlightenment.

Some of the key practices in Shingon Buddhism include:

• Mantra recitation: Shingon Buddhists recite specific mantras as a way to purify their minds and invoke the blessings of the buddhas and bodhisattvas.
• Mudra: Shingon Buddhists use specific hand gestures, or mudras, as a way to channel energy and invoke the presence of the buddhas and bodhisattvas.
• Visualization: Shingon Buddhists use visualization techniques to cultivate an understanding of the true nature of reality and to bring about the transformation of their own consciousness.
• Temple rituals: Shingon Buddhists may participate in various temple rituals, such as chanting sutras, making offerings to the buddhas and bodhisattvas, and engaging in prostrations.
• Study: Shingon Buddhists may study the teachings of the Buddha and the writings of the Shingon tradition in order to deepen their understanding of the path to enlightenment.

Overall, the practice of Shingon Buddhism involves a combination of physical and mental disciplines that are intended to help practitioners cultivate wisdom, compassion, and the realization of their own true nature.

There have been many prominent teachers and teaching lineages within the Shingon Buddhism tradition over the centuries. Here are a few examples:

1. Kūkai: Kūkai, also known as Kōbō-Daishi, is considered the founder of Shingon Buddhism. He was a 9th-century monk who studied esoteric Buddhism in China and brought its teachings to Japan, where he founded the Shingon school.
2. Ennin: Ennin was a 9th-century monk who was a contemporary of Kūkai and also studied esoteric Buddhism in China. He played a key role in the transmission of Shingon teachings to Japan and was the founder of the Enryaku-ji temple complex on Mount Hiei.
3. Eison: Eison was a 13th-century monk who was a prominent figure in the Shingon tradition and a key figure in the spread of Shingon Buddhism in Japan. He is known for his contributions to the development of the Shingon teachings and for his efforts to revive the Shingon school after a period of decline.
4. Chōgen: Chōgen was a 12th-century monk who was a major figure in the Shingon tradition and is known for his contributions to the development of Shingon rituals and practices.

These are just a few examples of the many teachers and teaching lineages within the Shingon Buddhism tradition. There have been countless other teachers and lineages that have contributed to the development and spread of this school of Buddhism over the centuries.