| Order1: | Ambassador of Japan to Singapore |
| Term Start1: | 13 October 2018 |
| Minister1: | Toshimitsu Motegi |
| Predecessor1: | Kenji Shinoda |
| Birth Date: | 22 September 1956 |
| Birth Place: | London, United Kingdom |
| Party: | Liberal Democratic Party |
| Alma Mater: | The University of Tokyo |
is a Japanese diplomat and the current Ambassador of Japan to Singapore.[1] He was formerly a United Nations Assistant Secretary-General at the Office of Programme Planning, Budget and Accounts, and Controller. He was appointed to the position by United Nations Secretary-General Ban Ki-moon in August 2008.[2]
Yamazaki worked the Japanese Ministry of Foreign Affairs for a number of years. He was Counsellor in the Embassy of Japan in Indonesia. He also acted as deputy director in the United Nations Administration Division of the Multilateral Cooperation Department of the Ministry of Foreign Affairs. In this capacity, he was in charge of administrative and budgetary affairs of the United Nations. He later became Director of the International Peace Cooperation Division and Deputy Director-General for Global Issues in the International Cooperation Bureau of the Ministry of Foreign Affairs in Japan and served until August 2008. From 2003 to 2007, he was a member of the United Nations Advisory Committee on Administrative and Budgetary Questions (ACABQ).
Yamazaki obtained his BA degree in international relations from The University of Tokyo.
Netherlands: Grand Officer of the Order of Orange-Nassau (29 October 2014)[3]