Tomoko Nagai (永井 奉子, Nagai Tomoko, born May 5, 1981) is a Japanese swimmer who won a bronze medal in the 4 × 200 m freestyle relay at the 2001 World Aquatics Championships.

Her team finished in fifth place, but the Australian and US squads were disqualified.

[2] She also competed in three events at the 2004 Summer Olympics.

Her best achievement was fifth place in the 4 × 100 m medley relay.

This Japanese swimming biography is a stub.