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Embassy of the Republic of Singapore in Tokyo

The Ambassador

Biographical summary of Mr Ong Eng Chuan, Ambassador of the Embassy of Singapore in Tokyo, Japan, and a list of the former Ambassadors.

Last updated 6 November 2025
Portrait photo of Ong Eng Chuan.

Mr Ong Eng Chuan was Deputy Secretary (Management), Ministry of Foreign Affairs from May 2016 to May 2023.

Mr Ong joined the Singapore Foreign Affairs in 1994. Prior to his Deputy Secretary appointment, Mr Ong served as Singapore’s Ambassador to Belgium with concurrent accreditation to the European Union, the Netherlands and Luxembourg from April 2012 to April 2016. He served twice in the Singapore Embassy in Tokyo as Deputy Chief of Mission and Minister-Counsellor from September 2005 to December 2008 and as First Secretary (Political) from November 1996 to January 2000. He also served as Counsellor (Political) in the Singapore Embassy in Washington from February 2004 to August 2005.

He was Director-General of the Northeast Asia Directorate from January 2009 to February 2012. He was also Special Assistant to then Foreign Minister S Jayakumar from December 2002 to January 2004.

Born in 1968, Mr Ong Eng Chuan graduated with a Bachelor of Engineering from Tokyo Institute of Technology, Japan in 1993, under the Japanese Government Monbusho Scholarship. He obtained his Masters of Arts in International Policy Studies from Stanford University, USA, in 2002, on a Fulbright Scholarship. Mr Ong was also a Pritzker International Fellow in the Center for Strategic and International Studies, Washington DC, in 2002.

Mr Ong was awarded the Public Administration Medal (Silver) in 2014, and the Long Service Medal in 2017. He is married to Mdm Esther Phua Boon See and they have a daughter.

Former Heads of Mission

Since diplomatic relations were established in 1966, 11 previous Heads of Mission have served in the Embassy, including our former President of Singapore, the late Mr Wee Kim Wee (1915-2005). 

Former Ambassadors of our Embassy include the following:

  • Dr Ang Kok Peng (June 1968 to April 1971)

  • Dr Loy Keng Foo (August 1971 to September 1972)

  • Wee Mon Cheng (June 1973 to August 1980)

  • Wee Kim Wee (September 1980 to April 1984)

  • Lee Khoon Choy (June 1984 to July 1988)

  • Cheng Tong Fatt (July 1988 to June 1991)

  • Lim Chin Beng (July 1991 to November 1997)

  • Chew Tai Soo (February 1998 to July 2004)

  • Tan Chin Tiong (October 2004 to January 2012)

  • Chin Siat Yoon (April 2012 to June 2017)

  • Lui Tuck Yew (June 2017 to October 2019)

  • Peter Tan Hai Chuan (October 2019 to April 2023)