I believe that when it really becomes a question of whether mankind will survive or not, then religion will return to a purer position, and will set out in a great new direction.”[5] Hagami maintained that for the advancement of world peace, Judaism, Christianity, and Islam must be reconciled, and that Japanese Buddhists—as religious people of the first victim of nuclear attack in human history—must serve as mediators for that reconciliation.

In March 1984, as a way, in part, to commemorate Sadat's death, Hagami organized a joint prayer meeting for world peace on Mount Sinai, by appealing to religious leaders in the US and Egypt.

130 people assembled there to represent Judaism, Christianity, Islam, Buddhism, and Shinto, from the US, Egypt, Israel and Japan, and prayed for the speedy end of the Middle East War and performed different religious ceremonies according to the respective styles of rituals.

[9] In August 1987, Hagami invited prominent leaders of various religions of the world to hold the first Religious Summit Meeting on Mount Hiei, Japan, in order to advance peaceful coexistence, interfaith dialogue, and acceptance of others.

He visited Israel in 1988 and was acquainted with a variety of religious leaders and scholars such as André Chouraqui, R.J. Zwi Werblowsky, and Chief Rabbi Mordechai Eliyahu.