It was formerly a member of the World Communion of Reformed Churches, but it chose to suspend its membership.
Some congregations with Calvinist background left this denomination to form the Japan Reformed Church.
Northeast Presbytery includes churches in Kyoto, Osaka, Shiga, Hyogo, Nara, Wakayama, Fukui, Tottori, Shimane, Hiroshima, Yamaguchi, Fukuoka, Saga, Nagasaki, Kumamoto, Oita, Miyazaki, Kagoshima and Okinawa.
[13] Shikoku Presbytery churches are in Tokushima, Kagawa, Ehime, Kochi and Okayama Prefecture.
Central Presbytery has congregations in Gifu, Shizuoka, Aichi, Mie, Ishikawa, Fukui and Toyama.