Aku no Hana is the fifth studio album by the Japanese rock band Buck-Tick. It was released on cassette and CD on February 1, 1990, through Victor Entertainment. It peaked at number one on the Oricon charts and is the group's best-selling album to date, having been certified double platinum by the RIAJ for over 500,000 copies sold. The title comes from Charles Baudelaire's volume of poetry, Les Fleurs du mal.
