The Institute publishes Toyo Gakujutsu Kenkyu (the Journal of Oriental Studies) as a scholarly publication and Toyo Tesugaku Kenshusho Kiyo (IOP Bulletin) to announce results of its research. Launched as a journal of Eastern thought in November 1962, Toyo Gakujutu Kenkyu has broadened into a journal examining a variety of current philosophical issues, from diverse viewpoints.
The first English edition, The Journal of Oriental Studies, was published in July 1987. The Institute also publishes a series of English booklets entitled Buddhism Today, and has published essays by SGI President Daisaku Ikeda on issues such as brain death and environmental problems.
Major works published by the IOP are as follows:
- Hokekyo ichiji sakuin (A Character Index to the Lotus Sutra, with its opening and closing sutras) (November 1977)
- Bukkyo shiso no genryu (The Wellsprings of Buddhist Thought), by Daisaku Ikeda (May 1978)
- Chugoku dento shakai to sono hoshiso (Traditional Chinese Society and Legal Thought), by Makoto Nemoto (June 1978)
- Shoki bukkyo no shiso (Early Buddhist Thought), by Mitsuyoshi Saigusa (July 1978)
- Gendai shakai to shukyo (Modern Society and Religion), by Keiichi Yanagawa (September 1978)
- Yuimakyo/shomangyo ichiji sakuin (Character Indexes to the Vimalakirti and the Shrimala Sutras), Institute of Oriental Philosophy, ed. (September 1979)
- Shiruku rodo to bukkyo bunka (The Silk Road and Buddhist Culture), Kei Okazaki, ed. (October 1979)
- Zoku shiruku rodo to bukkyo bunka (The Silk Road and Buddhist Culture, Vol. II), Takayasu Higuchi, ed. (April 1980)
- Uchinaru sekai--indo to nihon (Humanity at a Crossroads-- An Intercultural Dialogue), by Daisaku Ikeda and Karan Singh (June 1988)
- Buddhism Today, Institute of Oriental Philosophy, ed. (February 1990)
- Bukkyo--chowa to heiwa o motomete (Buddhism--A Quest for Unity and Peace), by Johan Galtung (January 1991)
- Yujinso o kangaeru (On Lay Funeral Services), Institute of Oriental Philosophy (May 1993)/Daisanbunmeisha
- Ikeda daisaku: idainaru mahatoma (Daisaku Ikeda: The Great Mahatma), by N. Radhakrishnan (July 1994)/Otorishoin
- Utsukushiki shishi no tamashii (The Lion's Heart), by Daisaku Ikeda and Professor Axinia D. Djourova (November 1999)
Lotus Sutra Manuscript Series
In an effort to preserve ancient texts and make them more widely available for study, the IOP has, with support from Soka Gakkai, been involved in the publication of a Buddhist manuscript series in Sanskrit, which includes facsimile editions and romanized texts of the Lotus Sutra manuscripts in other languages. In this way, students and researchers have access to the near equivalent of the original texts.
- Sanskrit Lotus Sutra Fragments from the Lushun Museum Collection, Facsimile Edition and Romanized Text (May 1997).
- Sanskrit Lotus Sutra Manuscript from the National Archives of Nepal, No. 4-21, Facsimile Edition (November 1998).
- Fragments of Manuscripts of the Saddharmapundarikasutra from Khadaliq (May 2000).
- Sanskrit Lotus Sutra Manuscript from the National Archives of Nepal (No. 4 -21), Romanized Text 1 (May 2001)
- Sanskrit Lotus Sutra Manuscripts from Cambridge University Library (Add. 1682 and Add. 1683), Facsimile Edition (March 2002).