March Comes In like a Lion (Japanese: 3月のライオン, Hepburn: Sangatsu no Raion, lit. "The Lion of March") is a Japanese manga series written and illustrated by Chica Umino. It has been serialized in Hakusensha's seinen manga magazine Young Animal since July 2007, with its chapters collected in sixteen tankōbon volumes as of September 2021. It features the life of Rei Kiriyama, an introvert and professional shogi player, who gradually develops both his play and his relationship with others.

An anime television series adapted by Shaft aired on NHK G from October 2016 to March 2017 and a second season aired from October 2017 to March 2018, with each season consisting of 22 episodes. The English dubbed version was released in four parts by Aniplex of America between December 2017 and April 2019. A two-part live-action film adaptation was released in 2017. Denpa will start releasing the English version of the manga in 2023. A spin-off of the manga ran from 2015 to 2020.

March Comes In like a Lion won the 4th Manga Taishō, the 35th Kodansha Manga Award in its general category, the 18th Tezuka Osamu Cultural Prize's Grand Prize, and the manga division's Grand Prix of the 24th Japan Media Arts Festival. The story has been praised for the psychological depiction of its characters. The anime adaptation has been overall well received by critics, being considered as one of the best of 2010s.