Blue World is the fifth Japanese language single of South Korean boy band Super Junior, released on 11 December 2013 by Avex Trax.

[2] It was announced on September 26, 2013, during the event E.L.F-JAPAN FESTIVAL 2013 that Super Junior would be releasing their fifth official Japanese single, "Blue World", in December 2013.

It was later revealed on October 23 the single was set for December 11, containing on the B-Side another song named "Candy".

"Blue World" peaked on the daily Oricon Singles Chart at number two, having sold 46,968 copies.

Super Junior made a collaboration with Tokyo JoyPolis named "Play the Blue World" with 3D technology, full color laser system and illumination stage until January 13, 2014, to promote the single.