"Deep Crimson Flower") is a song recorded by Japanese singer Shizuka Kudo for her fifteenth studio album, Jewelry Box.

It served as the theme song to the tanpatsu dramas aired between October 2000 and 2001 on AX's Kayō Suspense Gekijō time slot.

"Shinku no Hana" is Kudo's first single released through the label Extasy Japan.

As per an initial press release, a cover of a Janet Jackson song was planned to be included on the CD single, but was eventually omitted.

"Deep Crimson Rose"), the title song "Shinku no Hana" was written and produced by X Japan member and Extasy Records founder Yoshiki.