The Diocese of Hiroshima (Latin: Dioecesis Hiroshimaensis, Japanese: カトリック広島教区) is a Latin Church diocese of the Catholic Church located in the city of Hiroshima in the ecclesiastical province of Osaka 大阪 in Japan.

• May 4, 1923: Established as Apostolic Vicariate of Hiroshima from the Diocese of Osaka
• June 30, 1959: Promoted as Diocese of Hiroshima

• Bishops of Hiroshima (Roman rite)
  • Bishop Alexis Mitsuru Shirahama, P.S.S (since 2016.09.19)
  • Bishop Thomas Aquino Manyo Maeda (2011.06.13-2014.08.20)
  • Bishop Joseph Atsumi Misue (ヨゼフ三末篤實) (1985.03.29 - 2011.06.13)
  • Bishop Dominic Yoshimatsu Noguchi (ドミニコ野口由松) (1959.12.19 – 1985.03.29)
• Vicars Apostolic of Hiroshima 広島 (Roman rite)
  • Bishop Johannes Ross (ヨハネス・ロス), S.J. (1928.05.18 – 1940)
  • Archbishop Heinrich Döring (ハインリヒ・デーリング), S.J. (1921.06.16 – 1927.07.14)

• Roman Catholicism in Japan

• Diocese website
• Catholic Bishops' Conference of Japan
• GCatholic.org
• Catholic Hierarchy

34°23′N 132°27′E / 34.383°N 132.450°E / 34.383; 132.450