Riko Kawaguchi (Japanese: 川口 莉子, かわぐち りこ, Hepburn: Kawaguchi Riko, born 19 September 2004) is a Japanese ice hockey goaltender and member of the Japanese national team, currently playing with Daishin IHC in the Women's Japan Ice Hockey League (WJIHL) and the All-Japan Women's Ice Hockey Championship.

In addition to playing with Daishin IHC, Kawaguchi plays with the ice hockey team of her secondary school, Bushūkan Junior and Senior High School [ja] in Kushiro, Hokkaido, Japan.

[1] As a junior player with the Japanese national under-18 team, she participated in the 2022 IIHF U18 Women's World Championship Division I Group A. Kawaguchi played just over a third of Japan’s minutes in net and recorded a shutout against France.

[2] The goaltending tandem of Kawaguchi and Ririna Takenaka backstopped Japan’s whitewash of the tournament, as both net minders denied every shot against to record perfect 0.00 goals against average.

[3] Kawaguchi debuted with the senior national team at the 2022 IIHF Women's World Championship.