| Honorific Prefix: | Dato Paduka |
| Adnan Buntar | |
| Honorific Suffix: | DPMB |
| Office: | Ambassador of Brunei to Japan |
| Term Start: | 14 November 2005 |
| Term End: | October 2008 |
| Predecessor: | Nor Jeludin |
| Successor: | Alias Serbini |
| Office1: | Ambassador of Brunei to Germany |
| Term Start1: | 13 September 2002 |
| Term End1: | 2004 |
| Predecessor1: | Mahadi Wasli |
| Successor1: | Ali Hassan |
| Office2: | High Commissioner of Brunei to India |
| Term Start2: | 8 August 1994 |
| Term End2: | 1997 |
| Successor2: | Abdul Mokti |
| Birth Place: | Brunei |
| Occupation: | Diplomat |
| Spouse: | Pengiran Yura Alaiti |
| Relations: | Pengiran Yusuf (father-in-law) |
| Alma Mater: | Royal Holloway College (BSc) |
Mohd Adnan bin Buntar is a Brunei diplomat who became the high commissioner to India from 1994 to 1997, and ambassador to Japan from 2005 to 2008. He has held other major titles such as the Deputy Permanent Secretary of the Ministry of Foreign Affairs and Trade (MOFAT), and former chairman of the Brunei Japan Friendship Association.[1]
Mohd Adnan obtained his early education at the Anthony Abell College, Seria in 1973. He later attended the Royal Holloway College for his Bachelor of Science in Zoology.[2] In 1993, he was the Director-General, of ASEAN-Brunei Darussalam.[3] On 8 August 1994, at Rashtrapati Bhavan in New Delhi, Adnan, the High Commissioner-Designate of Brunei to India, presented his credentials to Shankar Dayal Sharma.[4] He was among the Brune delegation at the 50th anniversary of the United Nations Industrial Development Organization.[5]
On 13 September 2002, Adnan, the newly appointed ambassador to Germany, presented his letters of credentials to Annemarie Huber-Hotz.[6]
At the Istana Nurul Iman on 11 August 2005, Sultan Hassanal Bolkiah gave Adnan letters of credentials.[7] During his tenure as Ambassador from 2005 to 2008, he played a pivotal role in fostering friendship between Brunei Darussalam and Japan. 2006 saw Princess Masna Bolkiah, the MOFAT's Ambassador-at-Large, visit Japan, while 2007 saw the Sultan. In 2005, Adnan established a communication channel between Universiti Brunei Darussalam and Kagawa University, which helped the two institutions to sign a Memorandum of Understanding in 2006.
In his last year as ambassador, he saw the realisation of the economic alliance between Brunei and Japan. In the same year, Japan and Brunei inked an agreement to prohibit double taxation and combat fiscal evasion with regard to income taxes. This agreement laid the groundwork for future efforts to advance economic ties between the two nations.
After retirement, he remained actively involved in promoting bilateral ties through the Brunei Japan Friendship Association (BJFA), where he currently serves as Adviser I.[8]
Adnan is married to Pengiran Datin Hajah Yura Alaiti,[9] and Pengiran Yusuf is his father-in-law.[10]
The 2018 Spring Imperial Decorations awardees have been revealed by the Japanese government, and Adnan has been recognised for his noteworthy efforts to fostering goodwill and understanding between Brunei and Japan. He's awarded the Order of the Rising Sun 2nd Class for his achievements. He has earned the following honours;