A joint or articulation (or articular surface) is the location at which bones connect. They are constructed to allow movement (except for skull, sacral, sternal, and pelvic bones) and provide mechanical support, and are classified structurally and functionally.

"Joint", stylized as "JOINT", is the fifth maxi single by Japanese J-pop artist Mami Kawada, with both its A-side and B-side featured in her 2008 Savia album. It contains four tracks in both regular and instrumental versions and spans 17:40. Both its A-side and B-side tracks are featured as opening and ending themes for the second season of the anime series Shakugan no Shana. Geneon Entertainment released the single on October 31, 2007 in both a regular CD release and a limited CD and DVD that featured the music video for the track "Joint" bearing the catalog numbers GNCA-86 and GNCA-85 respectively.