Sasagu Arai

Sasagu Arai (荒井 献, Arai Sasagu, born May 6, 1930) is a Japanese researcher of early Christianity and Gnosticism. Arai is a Doctor of Theology Professor emeritus of University of Tokyo and Keisen University, and a member of the Japan Academy. He graduated (1962) at Erlangen-Nürnberg University in Germany.

He and his wife (and daughter Keiko) lived in the early 1960s with the family of the later Bishop of Bavaria and President of the Lutheran World Congress, Dr. Johannes Hanselmann, in Grub am Forst, Oberfranken, Germany.

Arai was a pioneer of the studies of Gnosticism after the discovery of the Nag Hammadi library.