| Type: | Bishop |
| Honorific-Prefix: | His Excellency |
| Peter Takaaki Hirayama | |
| Native Name: | 平山高明 (「ペトロ」) |
| Bishop Emeritus of Oita | |
| Archdiocese: | Nagasaki |
| Appointed: | November 15, 1969 |
| Term End: | May 10, 2000 |
| Predecessor: | Peter Saburō Hirata |
| Successor: | Dominic Ryōji Miyahara |
| Ordination: | March 19, 1957 |
| Consecration: | January 25, 1970 |
| Consecrated By: | Bruno Wüstenberg |
| Birth Date: | 1924 3, mf=yes |
| Birth Place: | Keijō, Keiki-dō, Korea, Empire of Japan |
| Death Place: | Oita, Japan |
Peter Takaaki Hirayama (March 31, 1924 – July 15, 2023) was a Japanese prelate of the Catholic Church.
Hirayama was born in Seoul and was ordained a priest on March 19, 1957. Hirayama was appointed bishop of the Diocese of Oita on November 15, 1969, and was consecrated on January 25, 1970. Hirayama served in this capacity until his retirement on May 10, 2000.