|Date of birth||February 7, 1976|
|Place of birth||Amagasaki, Hyōgo, Japan|
|Date of death||October 17, 2014(aged 38)|
|Place of death||Miyakojima, Okinawa, Japan|
|Height||1.73 m (5 ft 8 in)|
|1991–1994||Kobe Koryo Gakuen High School|
|2002–2006||Yokohama F. Marinos||117||(25)|
* Senior club appearances and goals counted for the domestic league only.
Oku turned professional after graduating from Kobe Koryo Gakuen High School in 1994. In 280 J. League matches, representing Jubilo Iwata, Yokohama F. Marinos and Yokohama FC, he scored 62 times. He played for Jubilo until 2001, helping the club win two league titles and then played five seasons with Yokohama F Marinos, where he won two more titles. He finished his career in 2007 after playing for one season with Yokohama.
Oku married actress Hinako Saeki in 2002. In 2013, Oku was arrested by Kanagawa Prefecture police after he threatened to kill Hinako on multiple occasions. Saeki eventually filed for divorce later that year. But prosecutors decided not to indict Oku.
On the morning of 17 October 2014, Oku was killed following a car accident on Miyako Island. He was driving on a prefectural road at about 4:25 a.m. when his car veered into the opposite lane and struck a telephone pole. According to police, he was transported to a hospital, where he was soon pronounced dead from a broken pelvis and other injuries.There were no other passengers in the car and following his death, police began investigating the cause of the accident.
|Japan national team|
- AFC Champions League: 1998–99; runner-up: 1999–2000, 2000–01
- Asian Super Cup: 1999
- J-League: 1997, 1999
- J. League Cup: 1998; runner-up 2001
- Japanese Super Cup: 1998, 2000
- "Former Japan soccer star Oku killed in car crash". Japan Today. 17 October 2014. Retrieved 27 October 2014.
- "Ex-Japan midfielder Oku killed in car crash". Japan News. 17 October 2014. Retrieved 27 October 2014.
- "Former Japan international Oku killed in crash". Washington Times. 17 October 2014. Retrieved 27 October 2014.
- "Ex-soccer pro Daisuke Oku arrested after threatening to kill wife". Japan Daily Press. 7 June 2013. Retrieved 27 October 2014.
- 元日本代表・奥大介氏が死去 ３８歳、宮古島で交通事故(Japanese)
- Daisuke Oku at National-Football-Teams.com
- "Records". Jubilo Iwata. Retrieved 27 October 2014.
- "Club History: 1999-". Yokohama F. Marinos. Retrieved 27 October 2014.