Great Japanese blog by scholar of Gohonzon [Saikakudoppo's Rhino Horn blog]

http://nichirenscoffeehouse.net/GohonzonShu/102.html

Most recent article [today] on the Soka Gakkai. Back to 2007, many great articles on the Gohonzon, Kao stamp and signature of Nichiren for authenticating Gohonzon and Gosho, history and analysis of particular Gohonzon, etc. Nichiren Mandalas 102 and 103 of the Gohonzonshu