Kouou was born in Hiroshima Prefecture in the 25th year of the Meiji era.
He pursued Buddhistic practices under Enkai at the Hosen-Ji Temple in Hiroshima.
In 1920, Kouou went to Hawaii to supervise the missionary activity.
In 1946, he became the first chairman of the Koya-san Shingon-Shu Sect of Buddhism.
In 1972, he became the 404th chief priest of the Kongobu-Ji Temple and also became the Kancho (Minister) of the Koya-san Shingon-Shu Sect.
And, Kouou contributed to the well-being of society.
He deceased in the 51st year of the Showa era at the age of 84.