Bryan Wilson / Karel Dobbelaere,
A Time to chant. The Soka Gakkai Buddhists in Britain, Oxford 1994

Daniel Metraux,
The Lotus and the Maple Leaf: The SGI Movement in Canada, University Press of America, Lanham 1996

Karel Dobbelaere,
Soka Gakkai, From Lay Movement to Religion, Turin 1998

Richard Hughes Seager,
Soka Gakkai and its Nichiren Humanism, in: Buddhism in Amerika, Columbia University Press, New York 1999

Phillip Hammond / David Machacek,
Soka Gakkai in America, Accomodation and Conversion, Oxford / New York 1999

David Machacek / Bryan Wilson,
Global Citizens: The Soka Gakkai Movement in the World, Oxford University Press, Oxford 2000

Richard Hughes Seager,
Encountering the Dharma: Daisaku Ikeda, Soka Gakkai, And the Globalisation of Buddhist Humanism, Berkley / Los Angeles / London 2006

Robert Kötter,
Die Soka Gakkai International - Deutschland, Geschichte - Struktur - Mitglieder, Marburg 2006