Reiji Kozawa (小澤 怜史, Kozawa Reiji, born March 9, 1998 in Mishima, Shizuoka Prefecture) is a Japanese professional baseball pitcher for the Tokyo Yakult Swallows of Nippon Professional Baseball.

In June 2018, Kozawa hurt his neck and back and spent the season rehabilitating.

[5] In 2020, Kozawa played in the Western League, and pitched in six games and recorded an ERA of .5.51.

[7] On December 14, 2020, Tokyo Yakult Swallows has signed with him as a developmental player.

[8] June 26, 2022, Kozawa re-signed a 6.5 million yen contract with the Tokyo Yakult Swallows as a registered player under control.