Shingon Buddhist International Institute 
The institute was set up to promote the understanding Japanese Shingon Buddhism. The pages here include Shingon Buddhist history and deities, rituals and teachings.
http://www.shingon.org/Daigoji Temple
Gives tourist information about this main temple for the Ono Branch of the Shingon School.
http://www.daigoji.or.jp/e/index.html
Shingon-shu Buzan-ha
Shingon-shu Buzan-ha is based on the teachings of three great Buddhist masters: Kobo Daishi, who systematized the esoteric teaching of Shingon Sect, Kogyo Daishi, who restored his teachings in the 12th century, and Senyo Sojo (Archbishop Senyo), who founded the Buzan Division in the 16th century.
http://www.buzan.or.jp/eng/index.html
Shingon Buddhism Introduction
One page intro.
http://www.koyasan.org/nckoyasan/introduction.html
Shingon Buddhism
Japanese history - Shingon, a major Japanese school of esoteric Buddhism.
http://www.compsoc.net/~gemini/simons/historyweb/shingon.html
A Short Biography of Kobo Daishi
http://www.mandala.ne.jp/koyasan/daishi.html
Japanese Esoteric Buddhist Studies
With Asunam Sensei. The Shingon School, Kobo Daishi, Koyosan, and Three Secrets.
http://www.asunam.com/japanese_esoteric_buddhist_studi.htm
