Here is a list of Takeuchi's best fights. For a list of Takeuchi's losses, refer to "Koji Takeuchi Losses".
On April 16, 2004 Koji Takeuchi faced off against Wataru Miki at age 29. He was coming in with a record of 3-6-5 (2), and Miki was 23 years old and with a record of 2-2-1 (1). Takeuchi stopped Wataru Miki via submission.
On May 27, 1999 Koji Takeuchi faced off against Mitsuo Matsumoto at age 24. He was coming in with a record of 1-2 (1), and Matsumoto was 27 years old and with a record of 1-3 (0). Takeuchi stopped Mitsuo Matsumoto via submission.
On May 22, 2000 Koji Takeuchi faced off against Makoto Ishikawa at age 25. He was coming in with a record of 2-2-1 (1), and Ishikawa was 25 years old and with a record of 3-2 (0). Takeuchi won the fight via 2-round majority decision.
On June 22, 2014 Koji Takeuchi faced off against Hiroshi Kozakai at age 40. He was coming in with a record of 7-8-5 (4). Takeuchi stopped Hiroshi Kozakai via submission.
