Sasagu Arai

[5] Arai was born in Akita prefecture, and he studied at Tokyo University, Graduate school.

[5] 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, 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.

[4][2] This was already suggested by the philosopher Hans Jonas before the discovery of the Nag Hammadi.

Arai adopted the concept of Daseinshaltung by Hans Jonas to elucidate the Gnosticism.