"Boku to Hana" (Japanese: 僕と花, "The Flower and I") (Japanese pronunciation: [bokutohana]) is a song by Japanese band Sakanaction. The theme song for the Tsuyoshi Kusanagi-starring medical drama 37-sai de Isha ni Natta Boku: Kenshui Junjō Monogatari, it was released as a single by the band in May 2012, the first from their sixth album Sakanaction.

The band created the song in a planned and structured manner, considering how it would be received by both Sakanaction's fan-base and the drama audience. The medium tempo pop song was praised by critics for its minimalist and nostalgic feel, as well as its emotive lyrics. Commercially, the song performed well, being certified gold by the Recording Industry Association of Japan three months after its release. The song's music video was recorded live in a single take, featuring Yamaguchi as a "delicate-hearted" protagonist dancing with choreographer Yoko Honaga playing a flower spirit. The performance was broadcast during a Ustream broadcast organized by the band.

In September 2011, Sakanaction released their fifth studio album Documentaly, which had reached number two on the Japanese Oricon albums chart; the highest position achieved by the band in their career at the time. The album was strongly affected by the events of the 2011 Tōhoku earthquake and tsunami which had occurred in March of that year, during the promotional period for their single "Rookie". The band's vocalist and songwriter Ichiro Yamaguchi felt a new resolution to create music that would resonate with a general pop music audience, who listened to idol acts such as Girls' Generation and AKB48. As rock music was no longer a popular staple during the early 2010s in Japan, Yamaguchi felt that the reasons people listened to music had changed over time, and wanted to mix rock music with entertainment-focused music in order to give these people the type of music that they look for.

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