|Date of birth||26 February 1987|
|Place of birth||Tokyo, Japan|
|Height||1.86 m (6 ft 1 in)|
|2009–2011||Kyoto Sanga FC||33||(4)|
|2007||North Korea U23|
|* Senior club appearances and goals counted for the domestic league only and correct as of 19:53, 10 May 2017 (UTC)
‡ National team caps and goals correct as of 24 April 2010
Kim made his professional debut for Kyoto Sanga FC on 4 April 2009, coming on as a late substitute in a J1 League match against the Kashima Antlers. He scored his first professional goal against Albirex Niigata on 22 August 2009, ensuring his club emerged as the winners of the match. On 16 January 2013, it was announced that Kim Seng-Yong would be signing with Nakhon Ratchasima of Thailand. On 25 November 2013, Kim signed for I-league debutant Rangdajied United for the remainder of the season. Kim signed for Royal Wahingdoh for the 2014-15 I-League season, where he appeared 19 times and scored 5 times, helping his side finish a remarkable 3rd in the league.
Kim was named as one of the North Korean squad for the 2010 AFC Challenge Cup. He made a full international debut for North Korea on February 19, 2010 in the 2010 AFC Challenge Cup against Kyrgyzstan at Sugathadasa Stadium in Colombo. He also played in a friendly match against South Africa in April 2010, prior to the 2010 FIFA World Cup.
Born and raised in Japan, it was his family connections and pride that made up his mind to choose North Korea, after his ancestors, like many during the time of World War II, chose to stay behind in Japan following the war and came to be known as Zainichi Korean. His father, Kim Kwang-Ho, was the first Zainichi Korean footballer to be called up for the senior Korea DPR national football team.
- "Stats Centre: Kim Seong-Yong Facts". Guardian.co.uk. Archived from the original on 2012-10-01. Retrieved 2010-01-30.
- "Kashima Antlers vs Kyoto Sanga F.C. 2 - 1". Soccerway. Retrieved 26 December 2011.
- "Albirex Niigata vs. Kyoto Sanga F.C. 1 - 2". Soccerway. Retrieved 26 December 2011.
- Another Asian Signs
- "Bengaluru FC sign strikers Kim Seng-Yong, Seiminlen Doungel". Zee News. 3 Jun 2015.
- "サンガの金が北朝鮮代表に". 京都新聞. 14 January 2010. Retrieved 20 January 2010.
- "South Africa vs. North Korea 0 - 0". Soccerway. Retrieved 26 December 2011.