He has previously played in Nippon Professional Baseball (NPB) for the Yomiuri Giants and Saitama Seibu Lions.

The following season, Takagi pitched in 25 games for Yomiuri, posting a 5-9 record and 4.31 ERA with 91 strikeouts in 117.0 innings of work.

[1] On December 17, 2017, Takagi was selected by the Saitama Seibu Lions as compensation for Ryoma Nogami's departure in free agency.

[4] On March 12, 2021, Takagi signed with the Kanagawa Future Dreams of the Baseball Challenge League.

[10] On January 4, 2023, Takagi returned to the Kanagawa Future Dreams of the Baseball Challenge League as a player and coach.