Crystal Kay discography
The discography of Japanese contemporary R&B singer Crystal Kay consists of 12 studio albums, two extended plays, five compilation albums, four video albums and numerous single releases. Crystal Kay debuted as a singer at 13 years of age in 1999 under Epic Records Japan. Her third album Almost Seventeen (2002) saw a great leap in popularity for Crystal Kay, reaching number two on Oricon's albums chart. In 2005, Cyrystal Kay sung the eponymous theme song for the Tsuyoshi Kusanagi drama Koi ni Ochitara: Boku no Seikō no Himitsu. "Koi ni Ochitara" became Crystal Kay's most successful single, being certified for a million ringtone downloads.
| Crystal Kay discography | |
|---|---|
| Studio albums | 12 |
| Compilation albums | 5 |
| EPs | 2 |
| Singles | 42 |
In 2011, Crystal Kay signed to Delicious Deli Records, after 11 years with Epic Records, and released the album Vivid (2012).[1] In March 2013 Crystal Kay relocated to New York City to pursue an American debut through Copetin Inc, releasing the single "Busy Doing Nothing" a year later. In October 2014 Crystal Kay re-focused on Japan by switching her management to LDH.[2]
Albums
Studio albums
| Title | Album details | Peak positions | Sales (JPN)[3][upper-alpha 1] | Certifications | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| JPN [4] |
KOR Overseas [5][upper-alpha 2][upper-alpha 3] |
TWN East Asian [7][upper-alpha 4][upper-alpha 5] | |||||||||
| C.L.L Crystal Lover Light |
|
60 | — | — | 19,000 | ||||||
| 637: Always and Forever |
|
19 | — | — | 49,000 | ||||||
| Almost Seventeen |
|
2 | — | — | 354,000 |
| |||||
| 4 Real |
|
6 | — | — | 246,000 |
| |||||
| Crystal Style |
|
2 | — | — | 297,000 |
| |||||
| Call Me Miss... |
|
2 | — | — | 251,000 |
| |||||
| All Yours |
|
1 | — | 5 | 137,000 |
| |||||
| Color Change! |
|
8 | — | — | 33,000 |
| |||||
| Spin the Music |
|
42 | 40 | — | 10,000 | ||||||
| Vivid |
|
35 | — | — | 5,000 | ||||||
| Shine |
|
10 | — | — | 17,000 | ||||||
| For You |
|
30 | — | — | 4,000 | ||||||
| "—" denotes items which were released before the creation of the G-Music or Gaon charts, or items that did not chart. | |||||||||||
Extended plays
| Title | Album details | Peak positions | Sales (JPN)[3] |
|---|---|---|---|
| JPN [4] | |||
| Shining |
|
21 | 12,000 |
| Flash |
|
29 | 6,000 |
Compilation albums
| Title | Album details | Peak positions | Sales (JPN)[3] | Certifications |
|---|---|---|---|---|
| JPN [4] | ||||
| Crystal Kay |
|
34 | 30,000 | |
| CK5 |
|
2 | 282,000 |
|
| Best of Crystal Kay |
|
3 | 156,000 |
|
| The Best Remixes of CK |
|
195 | 1,000 | |
| Love Song Best |
|
81 | 4,000 |
Singles
As a lead artist
| Title | Year | Peak chart positions | Sales (JPN)[3] | Certifications | Album | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| JPN Oricon [4] |
JPN Hot 100 [17][upper-alpha 6][upper-alpha 7] "Girlfriend",[20] "Boyfriend (Part II)",[21] "Koi ni Ochitara",[21] "Step by Step",[21] "Flash",[22] "Journey (Kimi to Futari de)",[23] "Superman",[24] "All You Need Is Love",[25] "Delicious na Kinyōbi",[26] "Forever",[27] "Answer",[28] "Physical",[29] "Inochi no Rhythm",[30] "Kimi ga Ita kara",[31] "Revolution",[32] "Nando demo",[33] "Very Special".[33] </ref> |
TWN East Asian [7][upper-alpha 5] | |||||||||
| "Eternal Memories" | 1999 | 47 | — | — | 20,000 | C.L.L Crystal Lover Light | |||||
| "Teenage Universe (Chewing Gum Baby)" | 47 | — | — | 13,000 | |||||||
| "Komichi no Hana" (こみちの花, "Path Flower") | 80 | — | — | 3,000 | |||||||
| "Shadows of Desire" | 2000 | — | — | — | |||||||
| "Girl's Night" | 2001 | 100 | — | — | 2,000 | 637: Always and Forever | |||||
| "Ex-Boyfriend" (featuring Verbal) |
44 | — | — | 21,000 | |||||||
| "Think of U" | 60 | — | — | 7,000 | Almost Seventeen | ||||||
| "Hard to Say" | 2002 | 26 | — | — | 45,000 | ||||||
| "Girl U Love" | 156 | — | — | 1,000 | |||||||
| "Boyfriend (Part II)" | 2003 | 23 | 40[upper-alpha 8] | — | 33,000 | 4 Real | |||||
| "I Like It" (Crystal Kay loves M-Flo) |
8 | — | — | 58,000 | |||||||
| "Candy" | 21 | — | — | 15,000 | |||||||
| "Can't Be Stopped" | 146 | — | — | 1,000 | |||||||
| "Motherland" | 2004 | 9 | — | — | 43,000 | CK5 | |||||
| "Bye My Darling!" | 40 | — | — | 7,000 | Crystal Style | ||||||
| "Kiss" | 2005 | 10 | — | — | 65,000 |
| |||||
| "Koi ni Ochitara" (恋におちたら, "If I Fall in Love") | 2 | 51[upper-alpha 8] | — | 295,000 | Call Me Miss... | ||||||
| "Two as One" (Crystal Kay x Chemistry) |
2 | — | — | 107,000 | |||||||
| "Kirakuni" ("Take It Easy") | 2006 | 27 | — | — | 14,000 | ||||||
| "Together" | — | ||||||||||
| "Kitto Eien ni" (きっと永遠に, "Surely for Eternity") | 2007 | 12 | — | — | 20,000 |
|
All Yours | ||||
| "Konna ni Chikaku de..." (こんなに近くで, "This Close...") | 14 | — | — | 17,000 |
| ||||||
| "Anata no Soba de" (あなたのそばで, "Next to You") | 30 | — | — | 7,000 | |||||||
| "Namida no Saki ni" (涙のさきに, "Beyond the Tears") | 2008 | 42 | 29 | — | 4,000 | Color Change! | |||||
| "One" | 32 | 20 | — | 7,000 | |||||||
| "Girlfriend" (featuring BoA) |
2009 | 31 | 57 | — | 4,000 | Best of Crystal Kay | |||||
| "After Love (First Boyfriend)" (featuring Kaname (Chemistry)) |
20 | Spin the Music | |||||||||
| "Journey (Kimi to Futari de)" (君と二人で, "Together with You") | 2010 | 193 | 14 | — | 400 | ||||||
| "Superman" | 2011 | 55 | 7 | — | 3,000 | Vivid | |||||
| "Delicious na Kinyōbi" (デリシャスな金曜日, "Delicious Friday") | 2012 | 171 | 9 | — | 400 | ||||||
| "Haruarashi" (ハルアラシ, "Spring Storm") | —[upper-alpha 9] | ||||||||||
| "Forever" | — | 6 | — | ||||||||
| "Busy Doing Nothing"[43] | 2014 | — | — | — | non-album singles | ||||||
| "Rule Your World"[44] | — | — | — | ||||||||
| "Dum Ditty Dumb"[45] | — | — | — | ||||||||
| "Kimi ga Ita kara" (君がいたから, "Because You Were There") | 2015 | 27 | 21 | — | 6,000 | RIAJ (digital): Gold | Shine | ||||
| "Revolution" (featuring Namie Amuro) |
6 | 8 | 4 | 19,000 | |||||||
| "Nando demo" (何度でも, "Many Times")[46] | — | 16 | — | RIAJ (digital):Gold | |||||||
| "Sakura" (サクラ, "Cherry Blossoms") | 2016 | 30 | —[upper-alpha 10] | — | For You | ||||||
| "Lovin' You" | 149 | — | — | ||||||||
| "Faces" | 2017 | — | — | — | |||||||
| "Shiawase tte." (幸せって。, "You are happy.") | 2018 | — | 80 | — | |||||||
| "Beautiful" | 2019 | — | — | — | non-album single | ||||||
| "Sangatsu Kokonoka" (３月９日, "March 9th") | 2020 | — | — | — | TBA | ||||||
| "Utautaino Ballad" (歌うたいのバラッド, "Ballad I want to sing") | — | — | — | ||||||||
| "I LOVE..." | — | — | — | ||||||||
| "—" denotes items which were released before the creation of the Billboard Japan Hot 100, or did not chart. | |||||||||||
As a featured artist
| Title | Year | Peak chart positions | Sales (JPN)[3] | Album | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JPN Oricon [4] |
JPN Hot 100 [17][upper-alpha 7] | ||||||||||||
| "Lost Child" (Hiroshi Fujiwara+Shinichi Osawa featuring Crystal Kay) |
2001 | 55 | — | 15,000 | Satorare Original Soundtrack / 637: Always and Forever | ||||||||
| "Reeewind!" (M-Flo loves Crystal Kay) |
2003 | 9 | — | 50,000 | Astromantic | ||||||||
| "Universe"[upper-alpha 11] (BoA featuring Crystal Kay and Verbal (M-Flo)) |
2009 | 8 | — | 22,000 | Best & USA | ||||||||
| "Lovin' You" (ラヴィン・ユー, Ravin Yū) (Shota Shimizu, Crystal Kay, Mummy-D, Seamo, Dohzi-T) |
2010 | — | — | Beat Connection | |||||||||
| "All You Need Is Love" (among Japan United with Music) |
2012 | 11 | 11 | 26,000 | Non-album single | ||||||||
| "Answer" (Tee with Crystal Kay) |
77 | 16 | 1,000 | Much Love | |||||||||
| "Where the Wild Things Are" (Far East Movement featuring Crystal Kay and Stereotypes) |
— | —[upper-alpha 12] | Dirty Bass | ||||||||||
| "Physical" (Bradberry Orchestra featuring Suga Shikao, Crystal Kay and Salyu) |
— | 72 | Non-album single | ||||||||||
| "Fantastic Journey" (Daishi Dance featuring Crystal Kay) |
— | —[upper-alpha 13] | Wonder Tourism | ||||||||||
| "Inochi no Rhythm" (イノチノリズム, "Rhythm of Life") (among Dance Earth Party) |
2013 | 5 | 5 | 20,000 | Non-album single | ||||||||
| "Rock City" (Exile Shokichi featuring Sway & Crystal Kay) |
2016 | — | — | The Future | |||||||||
| "PLAY THAT" (PKCZ featuring Hiroomi Tosaka, Crystal Kay & CRAZYBOY) |
2017 | — | — | 360° ChamberZ | |||||||||
| "Hot Like You (FIRE)" (Freddy Browne featuring Jimmy Cozier & Crystal Kay) |
2018 | — | — | The Recipe | |||||||||
| "Anata no Shiranai Watashitachi" (あなたの知らない私たち, "The Us You Don't Know") (chay featuring Crystal Kay) |
61 | — | Lavender | ||||||||||
| "—" denotes items which were released before the creation of the Billboard Japan Hot 100 or did not chart. | |||||||||||||
Promotional singles
| Title | Year | Peak chart positions | Album | ||||
|---|---|---|---|---|---|---|---|
| Billboard Japan Hot 100 [17][upper-alpha 7] | |||||||
| "Shining" | 2007 | — | Shining | ||||
| "Step by Step" | 2009 | 52 | Best of Crystal Kay | ||||
| "Flash" | 2010 | 40 | Flash | ||||
| "Time of Love" | — | Spin the Music | |||||
| "Take It Outside" | 2012 | — | Vivid | ||||
| "Memory Box" | — | ||||||
| "What We Do" | — | ||||||
| "My Heart Beat"[51] | 2013 | — | Non-album songs | ||||
| "Kaze no Kanata" (風の彼方, "The Other Side of the Wind")[51] | — | ||||||
| "Very Special" (featuring Ryuji Imaichi (Sandaime J Soul Brothers from Exile Tribe) |
2015 | 60 | Shine | ||||
| "Rain on Me"[52] (with Sumire, Tigarah & Ukico) |
2020 | — | Non-album songs | ||||
| "—" denotes items that were released before the creation of the Japan Hot 100, or did not chart. | |||||||
Other appearances
| Title | Year | Album | Notes |
|---|---|---|---|
| "L'amant" (Ken Hirai) | 2001 | Gaining Through Losing | Cameo introduction vocals |
| "Feel the Same?" (DJ Watarai featuring Big-O & Crystal Kay) | 2002 | Harlem Ver. 1.0 | |
| "Tha Superstar" (Michico) | Non-album song | Cameo vocals | |
| "Hello Goodbye" (Palm Drive featuring Crystal Kay & Corn Head) | 2003 | Block Holiday | |
| "Do U Like It? (by Fantastic Plastic Machine)" (Crystal Kay loves M-Flo) | "Reeewind!" (single) | Remix of "I Like It" | |
| "Get On!" (M-Flo loves Crystal Kay) | Astromantic | Originally appeared on the "Reeewind!" single | |
| "Reeewind! (Tomita Lab. Remix)" (M-Flo loves Crystal Kay) | 2004 | Astromantic Charm School | |
| "Get On! (Ugly Duckling Remix)" (M-Flo loves Crystal Kay) | |||
| "Love Don't Cry" (M-Flo loves Crystal Kay) | 2007 | Cosmicolor | |
| "Love Don't Cry (KGN8 Remix)" (M-Flo loves Crystal Kay) | Electricolor | Remixed by Stephen McGregor. | |
| "Music Is Mine" (Maboroshi featuring Crystal Kay) | 2009 | Maboroshi no Shi | |
| "Wonder" (Jin Akanishi featuring Crystal Kay) | KAT-TUN Live: Break the Records (video album) | Duet with Jin Akanishi, performed live at KAT-TUN's Summer '09 Break the Records (2009) tour and Akanishi's solo Yellow Gold 3011 (2011), however the studio recording has not been released. | |
| "Universe (BoA Release Party 2009 Best & USA: Thank You For Your Support!! @ Studio Coast)" (BoA featuring Crystal Kay & Verbal (M-Flo)) | 2010 | Identity (CD/DVD) | |
| "Zutto" (ずっと, "On and On") (Tokyo Ska Paradise Orchestra (Vocal: Crystal Kay)) | World Ska Symphony | ||
| "Love Don't Cry (live)" (M-Flo loves Crystal Kay) | M-Flo 10 Years Special Live: We Are One (video album) | ||
| "Reeewind! / Get On! (live)" (M-Flo loves Crystal Kay) | |||
| "Cannonball" | 10-nen Saki mo Kimi ni Koishite Original Soundtrack | Acted as the ending theme song for the drama, while Crystal Kay's song "Time of Love" was the theme song. | |
| "Zutto (live)" (Tokyo Ska Paradise Orchestra with Crystal Kay) | Tokyo Ska Paradise Kokugikan & Tokyo Ska Paradise Taiikukan Live DVD (video album) | ||
| "Jungle Boogie (live)" (ジャングル・ブギ, Janguru Bugi) (Tokyo Ska Paradise Orchestra with Tamio Okuda, Crystal Kay, Kazuyoshi Saito) | |||
| "Get On! (The Suitboys Remix)" (M-Flo loves Crystal Kay) | 2011 | After 5 Vol. 1 | Remixed by Taku Takahashi. |
| "Koi ni Ochitara (live)" | Jyonetsu Tairiku Live Best | ||
| "Suki (live)" (Dreams Come True with Crystal Kay) | 2012 | Minna de Dori Suru? Do You Dreams Come True? Special Live! (video album) | |
| "Asa ga Mata Kuru (live)" (朝がまた来る, "The Morning Still Comes") (Dreams Come True with Crystal Kay) | |||
| "Endless Love" (Lionel Richie with Crystal Kay) | Tuskegee (Japanese Edition) | Japanese bonus track, replacing Shania Twain's vocals with Crystal Kay's. | |
| "Eyes on Me (live)" | Final Fantasy Orchestral Album (video album) | ||
| "Senka no Hoshi de" (戦下の地球(ほし)で, "On the Planet Under War") (among Dance Earth Party) | 2013 | "Inochi no Rhythm" (single) | |
| "Boyfriend (Part II) (live)" | Live & Documentary DVD "AP Bank Fes '12 Fund for Japan" (video album) | DVD charity concert for AP Bank. | |
| "I Don't Care" (Aklo featuring Crystal Kay) | 2014 | The Arrival | |
| "All My Ladies" (Che'Nelle featuring Crystal Kay & Thelma Aoyama) | 2015 | @chenelleworld | |
| "Nekketsu" (Nekfeu featuring Crystal Kay) | 2016 | Cyborg | |
| "Inochi no Rhythm ~Great Journey~" (イノチノリズム ~Great Journey~, "Rhythm of Life ~Great Journey~") (DANCE EARTH PARTY featuring EXILE NESMITH with Crystal Kay) | 2017 | I | Cd and DVD |
| "Without You" (JAY'ED featuring Crystal Kay) | Here I Stand | ||
| "World Is Yours" (PKCZ featuring Crystal Kay, MIGHTY CROWN (MASTA SIMON & SAMI-T)) | 360°ChamberZ | ||
| "T-REX" (PKCZ featuring Crystal Kay, CRAZYBOY, ANARCHY ) | |||
| "Ai wa Naze" (愛はなぜ, "Why is love") (Sung Si-kyung with Crystal Kay) | 2018 | Kimi ga Iru yo | |
| "TAYUTAU" (LNoL featuring Crystal Kay) | 2019 | Equanimity | |
| "Your Hands", "Tetris Crystal", "I Think the Game", "On Top", "I Love Vertigo" (Chassol featuring Crystal Kay) | 2020 | Ludi | Appearing also in the video version of the album. |
Video albums
| Title | Album details | Peak positions | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| JPN [4] | |||||||||||||
| CK 99—04 Music Clips |
|
19 | |||||||||||
| CK 04—09 Music Clips 2: Decade |
|
253 | |||||||||||
| Crystal Kay Live in NHK Hall: 10th Anniversary Tour CK10 |
|
122 | |||||||||||
| CK Live 2012: Vivid |
|
— | |||||||||||
| "—" denotes items that did not chart. | |||||||||||||
Notes
- Sales provided by Oricon database and are rounded to the nearest thousand copies, or for when the value rounds to zero, the nearest hundred copies.
- The Gaon Albums Chart was established in 2010. The overseas chart is a sub-chart listing all non-Korean released which have charted.
- Week references for Gaon: Rock 'n' Roll Circus,[6]
- The G-Music chart was established in July 2005 and only archives the top 20 releases. The East Asian chart is a sub-chart that compiles all non-Chinese Asian language releases which have been popular on the charts.
- Week references for G-Music: All Yours 2007 week 25, "Revolution".[8]
- The Japan Hot 100 was established in February 2008.
- Sources for chart positions are as follows: "Namida no Saki ni",[18] "One",[19] "After Love (First Boyfriend)",<ref name='Billboard 2009/08/24'>"Japan Billboard Hot 100". Billboard (in Japanese). August 19, 2009. Retrieved September 12, 2014.
- Charted in 2009.
- Charted at number 90 on the Adult Contemporary Airplay chart.[42]
- Charted at number 96 on the Radio Songs sub-chart.[47]
- As one of the three A-sides of the single "Eien / Universe / Believe in Love".
- Charted at number 47 on the Adult Contemporary Airplay and at 99 on the Hot Top Airplay charts.[48][49]
- Charted at number 78 on the Adult Contemporary Airplay chart.[50]
References
- "Crystal Kayユニバーサル移籍、待望シングル12月に登場" (in Japanese). Natalie. October 16, 2011. Retrieved September 13, 2014.
- "Crystal Kay | MUSICIAN | ARTIST | LDH" (in Japanese). LDH. Retrieved November 18, 2015.
- "オリコンランキング情報サービス「you大樹」" [Oricon Ranking Information Service 'You Big Tree']. Oricon (in Japanese). Retrieved September 12, 2014.
- "Crystal Kayのリリース一覧" [List of Crystal Kay's Releases]. Oricon (in Japanese). Retrieved September 12, 2014.
- "Gaon Album Chart 국외". Gaon Music Chart (in Korean). Korea Music Content Industry Association. Archived from the original on July 14, 2014. Retrieved July 18, 2014.
- "2010년 52주차 Album Chart 국외". Gaon Music Chart (in Korean). Korea Music Content Industry Association. Archived from the original on September 13, 2014. Retrieved September 12, 2014.
- "G-Music J-Pop Chart" (in Chinese). G-Music. Archived from the original on May 8, 2011. Retrieved September 12, 2014.
- g-music 風雲榜. G-Music. September 25, 2015. Archived from the original on October 30, 2015. Retrieved October 23, 2015.
- ゴールド等認定作品一覧 2003年10月 [Works Receiving Certifications List (Gold, etc) (October 2003)] (in Japanese). Recording Industry Association of Japan. November 10, 2003. Retrieved March 29, 2014.
- ゴールド等認定作品一覧 2003年12月 [Works Receiving Certifications List (Gold, etc) (December 2003)] (in Japanese). Recording Industry Association of Japan. January 10, 2004. Retrieved February 15, 2014.
- ゴールド等認定作品一覧 2005年4月 [Works Receiving Certifications List (Gold, etc) (April 2005)] (in Japanese). Recording Industry Association of Japan. May 10, 2005. Retrieved March 18, 2014.
- ゴールド等認定作品一覧 2006年2月 [Works Receiving Certifications List (Gold, etc) (February 2006)] (in Japanese). Recording Industry Association of Japan. March 10, 2006. Retrieved January 22, 2014.
- ゴールド等認定作品一覧 2007年6月 [Works Receiving Certifications List (Gold, etc) (June 2007)] (in Japanese). Recording Industry Association of Japan. July 10, 2007. Retrieved February 13, 2014.
- ゴールド等認定作品一覧 2008年8月 [Works Receiving Certifications List (Gold, etc) (August 2008)] (in Japanese). Recording Industry Association of Japan. September 10, 2008. Retrieved March 29, 2014.
- ゴールド等認定作品一覧 2004年7月 [Works Receiving Certifications List (Gold, etc) (July 2004)] (in Japanese). Recording Industry Association of Japan. August 10, 2004. Retrieved February 15, 2014.
- ゴールド等認定作品一覧 2009年9月 [Works Receiving Certifications List (Gold, etc) (September 2009)] (in Japanese). Recording Industry Association of Japan. October 10, 2009. Retrieved March 29, 2014.
- "Hot 100｜JAPAN Charts｜Billboard JAPAN" (in Japanese). Billboard.
- "Japan Billboard Hot 100". Billboard (in Japanese). June 18, 2008. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). July 23, 2008. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). September 9, 2009. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). June 23, 2010. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). December 1, 2010. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). November 9, 2011. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). February 1, 2012. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). March 14, 2009. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). June 13, 2012. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). April 18, 2012. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). August 6, 2012. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). January 23, 2013. Retrieved September 12, 2014.
- "Japan Billboard Hot 100". Billboard (in Japanese). June 10, 2015. Retrieved June 10, 2015.
- "Japan Billboard Hot 100". Billboard (in Japanese). September 23, 2015. Retrieved September 23, 2015.
- "Japan Billboard Hot 100". Billboard (in Japanese). December 23, 2015. Retrieved December 24, 2015.
- レコード協会調べ 12月度有料音楽配信認定 [Record Association Investigation: December Digital Music Download Certifications] (in Japanese). Recording Industry Association of Japan. January 20, 2012. Retrieved January 26, 2014.
- レコード協会調べ 8月度有料音楽配信認定 [Record Association Investigation: August Digital Music Download Certifications] (in Japanese). Recording Industry Association of Japan. September 20, 2006. Retrieved January 23, 2014.
- レコード協会調べ 1月度有料音楽配信認定 [Record Association Investigation: January Digital Music Download Certifications] (in Japanese). Recording Industry Association of Japan. February 28, 2014. Retrieved March 4, 2014.
- ゴールド等認定作品一覧 2005年6月 [Works Receiving Certifications List (Gold, etc) (June 2005)] (in Japanese). Recording Industry Association of Japan. July 10, 2005. Retrieved January 1, 2014.
- レコード協会調べ 10月度有料音楽配信認定 [Record Association Investigation: October Digital Music Download Certifications] (in Japanese). Recording Industry Association of Japan. November 20, 2006. Retrieved January 23, 2014.
- ゴールド等認定作品一覧 2005年9月 [Works Receiving Certifications List (Gold, etc) (September 2005)] (in Japanese). Recording Industry Association of Japan. October 10, 2005. Retrieved January 22, 2014.
- レコード協会調べ 7月度有料音楽配信認定 [Record Association Investigation: July Digital Music Download Certifications] (in Japanese). Recording Industry Association of Japan. August 20, 2007. Retrieved December 23, 2013.
- レコード協会調べ 4月度有料音楽配信認定 [Record Association Investigation: April Digital Music Download Certifications] (in Japanese). Recording Industry Association of Japan. May 20, 2010. Retrieved January 22, 2014.
- "Japan Billboard Adult Contemporary Airplay". Billboard (in Japanese). March 21, 2012. Retrieved September 12, 2014.
- Nichelle, Nekia (March 20, 2014). "Are You Busy Doing Nothing". ChicagoNow. Retrieved November 5, 2015.
- Peterson, Jaques (May 9, 2014). "J-Pop Superstar Crystal Kay Comes To America With 'Rule Your World'". Popdust. Retrieved November 5, 2015.
- Murphy, Kelly (August 26, 2014). "New Video Alert: Dum Ditty Dumb by Crystal Kay". Indieminded. Retrieved November 5, 2015.
- Crystal Kay、新曲が篠原涼子主演ドラマ「オトナ女子」挿入歌に決定. M-On! Entertainment. October 10, 2015. Retrieved November 5, 2015.
- "Radio Songs". Billboard (in Japanese). March 16, 2016. Archived from the original on March 20, 2016. Retrieved March 16, 2016.
- "Japan Billboard Adult Contemporary Airplay". Billboard (in Japanese). June 27, 2012. Retrieved September 12, 2014.
- "Japan Billboard Hot Top Airplay". Billboard (in Japanese). July 4, 2012. Archived from the original on September 13, 2014. Retrieved September 12, 2014.
- "Japan Billboard Adult Contemporary Airplay". Billboard (in Japanese). November 21, 2012. Retrieved September 12, 2014.
- Crystal KayがCMソング2曲同時配信、ライブDVDも. Natalie. February 28, 2013. Retrieved November 5, 2015.
- Charity Collaboration Project「ALL FOUR ONE」始動！. Universal Music Japan. December 15, 2020. Retrieved February 1, 2021.
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