A Igreja no Japão atualmente, está dividida em 16 dioceses.
Veja os nomes das dioceses, e quais estados ela abrange:
Diocese de Sapporo –
Hokkaido
Diocese de Sendai –
Miyagi/ Aomori/ Iwate/ Fukushima
Diocese de Niigata–
Niigata/ Yamagata/ Akita
Diocese de Saitama –
Saitama/ Tochigi/ Gunma/ Ibaraki
Diocese de Tokyo
Tokyo/ Chiba
Diocese Yokohama
Kanagawa/ Shizuoka/ Nagano/ Yamanashi
Diocese Nagoya
Aichi/ Gifu/ Ishikawa/ Fukui/ Toyama
Diocese de Kyoto
Kyoto/ Shiga/ Nara/ Mie
Diocese de Osaka
Osaka/ Hyogo/ Wakayama
Diocese de Hiroshima
Hiroshima/ Yamaguchi/ Shimane/ Okayama/ Tottori
Diocese de Takamatsu
Kagawa/ Ehime/ Tokushima/ Kochi
Diocese de Fukuoka
Fukuoka/ Saga/ Kumamoto
Diocese de Nagasaki
Nagasaki
Diocese de Oita
Oita/ Miyasaki
Diocese de Kagoshima
Kagoshima
Diocese de Naha
Okinawa