Released: October 16, 2013 (2013-10-16) (digital download)
Caps Lock (stylized as CAPS LOCK) is the fourteenth studio album of Japanese electronica duo Capsule, released on October 23, 2013 by Warner Music Japan sublabel Unborde as their first album release under the label. The album was released digitally through more than a hundred countries worldwide by iTunes on October 16, 2013. Caps Lock debuted at number seven and thirteen of the Oricon Daily and Weekly Albums Chart, respectively, with 11,805 copies sold on its first week of release.
In early 2013, the duo parted ways with Yamaha Music Communications, effectively shutting down the Contemode sublabel by releasing a best-of album Rewind Best 1 & 2 way back March as their last release from the label. On July 31, 2013, AsobiSystem (the duo's new management agency) and Warner Music Japan sublabel Unborde joined forces by releasing a compilation album AsobiTunes, which features new and old songs from different Asobisystem and Unborde artists. Member Yasutaka Nakata had contributed four tracks in the compilation: a new song entitled "Rainbow", a remix of Rip Slyme's "Nettaiya", an extended mix of Kyary Pamyu Pamyu's PonPonPon and Meg's "Secret Adventure". On August 3, 2013, the duo has announced that they had officially signed with Unborde, joining fellow labelmates Kyary Pamyu Pamyu, Rip Slyme and Androp, among others. It was followed by a new album announcement, but details were disclosed by August 29, 2013 with a promotional photo, album title and the release date. On September 10, 2013, the covers and tracklist for the album were revealed.
On an interview with Japan Times, member and songwriter-producer Yasutaka Nakata has stated that he wanted to do something new with the group upon their transfer from Yamaha to Warner. He also stated that the extreme editing that he has done upon vocalist Toshiko Koshijima's vocals indicates that he does not want to perform the songs live, as he always just wanted to make music rather than presenting what he had finished by performance in front of people who wanted to hear them live. None of the songs in the album were used as tie-ups for products and services, giving the album almost zero promotion. Meanwhile, Koshijima did not participate in any of the interviews for the album.
The album was released digitally worldwide on October 16, 2013, a week before its Japanese release date, in more than a hundred countries in iTunes and managed to get the number one spot in Hong Kong, Singapore and Taiwan while reaching number two in both France and the United States.