W"Ai am Best" is the first "best of" compilation album by Ai Otsuka. The album contains 13 pre-2006 tracks with the respective music video for each. "Ai am Best" was released on March 28, 2007. The title of the album is a pun on her first name, Ai, which is pronounced like the English word "I".
WLove Cook is Ai Otsuka's third album released on 14 December 2005 under the Avex Trax record label. It was released in four formats: CD only, CD+DVD, CD+Photobook and CD+Picture Book. The latter two are limited to 150,000 copies each, and feature different sleeve case covers. The picture book illustrations are hand-drawn by Ai herself.
WLove Is Best is the second 'Best of' compilation album to be released by Ai Otsuka on 11 November 2009. Its theme is love. It will come in both a CD-only format and a CD+DVD format. Fifteen songs are included. The first press edition comes with a pair of eyeglasses called "Love Eyes".
WLove It is the debut mini-album of Ai Otsuka under her pen name Love. It was released on November 18, 2009 under the label Avex Trax, and was released only one week after the release of Otsuka's compilation album Love Is Best.
WLove Jam is the second album by Ai Otsuka, released on 17 November 2004 under the Avex Trax record label. This album was available in CD and CD+DVD editions. The first-press of the CD Only edition came with an 80-page illustration book drawn by Ai Otsuka herself. The album hit #30 in 2005, selling 414,513 copies. In total, the album has sold about 656,708 copies.
WLove Fantastic is the sixth studio album released by Ai Otsuka on 16 July 2014. It was her first album released in 6 years, as the previous one—Love Letter—was released in 2008.
WLove Letter is the fifth studio album released by Ai Otsuka on 17 December 2008. It come in a CD-only format and CD + DVD format. Thirteen songs are included; four from her singles Pocket, Rocket Sneaker / One × Time and Kurage, Nagareboshi.
WLove Tricky is the seventh studio album released by Ai Otsuka on 22 April 2015. It's her first studio album, that has not any single release prior release of the album. It was released in both a CD+DVD edition and a CD edition; if purchased through her official fan club is came with a bonus CD featuring remixes. The album was co-produced by Abe Noboru from Studio Apartment and presents a sound that is slightly more electronic than her older works.
WLove Piece is Ai Otsuka's fourth album. It was released in two formats: CD Only and CD + DVD. The first press of the CD+DVD version includes a special music video of the song U-Boat from Otsuka's LOVE COOK album, while the first press of the CD Only version includes a 40-page original photo-book. The first press of both versions also includes a box three times the size of a regular CD, with a coloured case in one of six colours.
WLove Punch is the debut album by Ai Otsuka released on 31 March 2004 under the Avex Trax record label. This album was released in two formats: a CD Only version and a CD+DVD version. The CD+DVD edition comes with a DVD containing promo clips and interviews. Initial pressings contained a limited edition picture book. The album reached #3 on the Oricon charts and stayed on the charts for a total of 98 weeks. Because the album sold 519,300 copies in 2004, it became the #20 most popular album of 2004. However, it also charted on the 2005 end-of-year charts at #94 as it sold 159,025 copies in that year as well. In total, this album has sold 698,277 units.