| Jurisdiction: | Diocese |
| Nagoya | |
| Local: | Japanese: カトリック名古屋教区 |
| Latin: | Dioecesis Nagoyaensis |
| Country: | Japan |
| Territory: | Aichi, Ishikawa, Toyama, Gifu, and Fukui |
| Metropolitan: | Osaka |
| Province: | Osaka |
| Rite: | Latin Rite |
| Cathedral: | Cathedral of St Peter and St Paul in Nagoya |
| Area Km2: | 28,486 |
| Population: | 12,409,860 |
| Population As Of: | 2004 |
| Catholics: | 25,380 |
| Catholics Percent: | 0.2 |
| Bishop: | Michael Gorō Matsuura[1] |
| Metro Archbishop: | Thomas Aquino Manyo Maeda |
| Emeritus Bishops: | Augustinus Jun-ichi Nomura |
| Map: | Giappone - Diocesi di Nagoya.png |
| Website: | http://www.nagoya.catholic.jp/ |
The Diocese of Nagoya (Latin: Dioecesis Nagoyaensis, Japanese: カトリック名古屋教区) is a Latin Church diocese of the Catholic Church that is centered in the city of Nagoya and is part of the ecclesiastical province of Osaka in Japan.
On February 18, 1922, the Apostolic Prefecture of Nagoya was formed out of the Apostolic Prefecture of Niigata and Metropolitan Archdiocese of Tōkyō. Forty years later, on April 16, 1962, the apostolic prefecture was elevated to diocese.
The current bishop is Michael Gorō Matsuura who was formerly an auxiliary bishop of the Archdiocese of Osaka, and the titular bishop of Sfasferia. He was appointed by Pope Francis on Sunday, March 29, 2015, succeeding Augustinus Jun-ichi Nomura.