1st Album; Released December 29, 2000
- ミルク / Milk
- 疾風雲 / Hayategumo
- PhuLa PhuLa
- カナリヤ / Kanariya
- 鼓動 / Kodou
- もしも… / Moshimo...
- ゆうえんち / Yuuenchi
- サヨナラ・ジレンマ / Sayonara Dilemma
- アスピリン / Aspirin
- 羽 / Hane
- 春色 / Haruiro
- ひとりごと / Hitorigoto
- 疾風雲 / Hayategumo
- ひとりごと(Karaoke ver.)
- 疾風雲(Karaoke ver.)
- ひとりごと(Instrumental ver.)
- 疾風雲(Instrumental ver.)
- Suppuration
- β－粘土の惑星 / β－Nendo no Hoshi
- 地に還る / Chi ni Kaeru
- 冬の雫: White Summer Style / Fuyu no Shizuku: White Summer Style
Third Album; Released June 26, 2002
- 涙の誓い / Namida no Chikai
- Flow: 水の生まれた場所 / Flow: Mizu no Umareta Basho
- I Can't Get Over Your Best Smile
- Resolution of Soul
- Wing My Way
- 君よ、優しい風になれ / Kimi yo, Yasashii Kaze ni Nare
Fourth Album; Released September 5, 2003
- Face of Fact
- Save Your Heart: Album Mix (with Kaori Utatsuki)
- 遮光: Album Mix / Kageri: Album Mix
- Feel in Tears
- 夏草の線路: Album Mix / Natsukusa no Senro (with Kaori Utatsuki)
- Lament
Fifth Album; Released September 5, 2003
- Heart of Hearts
- Close to Me...
- Sensitive
Sixth Album; Released September 30, 2005
- Abyss
- We Survive
- Lupe
- Imaginary Affair
- Trust You're Truth: 明日を守る約束 / Trust You're Truth: Ashita wo Mamoru Yakusoku
- Collective
released December 29, 2000
- Prime (Kotoko to Aki)
- 空より近い夢: Second Track / Sora Yori Chikai Yume: Second Track (Kotoko to Aki)
- 明日の向こう / Ashita no Mukou
released December 29, 2002
- Dirty Boots (Outer)
released December 29, 2004
- 涙の誓い: The Divine Pledge of Tears / Namida no Chikai: The Divine Pledge of Tears
released December 29, 2007
- Synthetic Organism (Outer)
- Hallucino: Remix
- Time Heals All Sorrows
- L.A.M: Laze and Meditation: 2001 P.V Long Arrange Mix (Outer)
- Crossed Destiny
- Philosophy: Proto Type Mix
- Leave Me Hell Alone (Outer)
released September 24, 2008
- Suppuration: Core (G.M.S. remix)
- リアル鬼ごっこ / Real Onigokko (Ben Watkins from Juno Reactor remix)
- Re-sublimity (Shiva Joerg & Hard Stuff remix)
- Uzu-Maki (Eat Static remix)
released December 28, 2008
- 季節の雫 / Kisetsu no Shizuku
- Belvedia
released March 25, 2009
- snIpe
- Close to Me...: I've in Budokan 2009 Live Ver.
- Snipe: Instrumental
- Snipe PV
- 「Departed to the Future」Chapter2:Kotoko
released November 27, 2003
- Change My Style: Anata no Konomi no Watashi ni (あなた好みの私に)
- Ren'ai CHU!: Remix (恋愛CHU！) (with Kaori Utatsuki)
- Sakuranbo Kiss: Bakuhatsu Damo n (さくらんぼキッス: 爆発だも ん)
- You're My Treasure (with Aki and Rimikka)
- Achichina Natsu no Monogatari (あちちな夏の物語り)
- Magical Sweetie
- Cream+Mint
- Omoide wa Kaze no Naka de... (想い出は風の中で…)
- Short Circuit
released June 22, 2007
- Nee, ...Shiyou yo! (ねぇ、…しようよっ！)
- Seishun Rocket (↑青春ロケット↑)
- Princess Bride!
- Atarashii Koi no Katachi: Short Circuit Edit (新しい恋のかたち)
- Mighty Heart: Aru Hi no Kenka, Itsumo no Koigokoro (ある日のケンカ、いつもの恋心)
- Hajimemashite, Koi. (はじめまして、恋。)
- Otomegokoro Tasu Nekomimi no Heihoukon wa Mugen (乙女心＋√ネコミミ＝∞) (with Eiko Shimamiya)
- Kyururun Kiss de Jumbo (きゅるるんkissでジャンボ♪♪)
- Princess Brave!
- Maple Syrup (めぃぷるシロップ)
- Double HarmoniZe Shock!! (with Kaori Utatsuki)
A Piacere (Chanter: キミの歌がとどいたら)Absurd (まいにち好きして)Achichina Natsu no Monogatari (あちちな夏の物語り) (Ripple: ブルーシールへようこそっ)[Lyrics: Kotoko, Composition/Arrangement: Kazuya Takase]Akanezora: Sore ga Bokura no Sekai Datta (茜空 ～それが僕らの世界だった～) (真剣で私に恋しなさい！)[Lyrics: Kotoko, Composition/Arrangement: C.G mix]Allegretto: そらときみ / Allegretto: Sora to Kimi (Kono Aozora ni Yakusoku o)Amethyst (兄嫁)Amethyst: Remix (妻みっくす)Ano Hi no Kimi e (あの日の君へ) (Stokesia)[Lyrics: Kotoko, Composition/Arrangement: Kazuya Takase]Blossomdays (ハチミツ乙女blossomdays)Boundary Line (Silent Half)Bumpy-Jumpy! [ナツユメナギサ: Natsu Yume Nagisa]Cave (Deep2)Change My Style: あなた好みの私に / Change My Style Anata no Konomi no Watashi ni (コスって! My Honey)Close to Me... (Effect: 悪魔の仔)Cream+Mint (ショコラ: Maid Cafe "Curio")Crossed Destiny: Original Arrange (OnlyYou リ・クルス extra disc)Crossed Destiny: Fish中坪 Arrange (OnlyYou リ・クルス extra disc)Cross Up (OL姉妹)Do You Feel Loved? (オレ様ティーチャー: 復讐教師のWebカウンセリング)Face of Fact (Baldr Force: バルドフォース)Face of Fact: Remix (Baldr Force: バルドフォース)Fatally (Duel Savior)Feel in Tears (Heart of Hearts)Fickle (はらみこ)Fusion Star (あねいも: アイとHのステップアップ)Flow: 水の生まれた場所 / Flow: Mizu no Umareta Basho (水素: 1/2の奇蹟)Genzai no Requiem (原罪のレクイエム) (Prism Ark)[Lyrics: Kotoko, Composition/Arrangement: C.G mix]Hajimemashite, Koi. (はじめまして、恋。) (淫妹Baby)[Lyrics: Kotoko, Composition/Arrangement: Kazuya Takase]Hallucino (夢幻の迷宮3 Type S)Hallucino: Remix (夢幻の迷宮 Platinum Edition SO)Heart of Hearts (Heart of Hearts)Ideal Forest (無差別恋愛)I Need Magic: 解けないマジ☆キュン♪ / I Need Magic: Kaikenai Majikyun(カラフルウィッシュ: 12コのマジキュン！)I Pray to Stop My Cry (凌辱看護婦学院)I-Doll: Song for Eternity (I-Doll: アイドル)Imaginary Affair (こなたよりかなたまで)Jihad (BALDRSKY Dive2)Joushiki! Butler Koushinkyouku (常識！ バトラー行進曲) (君が主で執事が俺で: お仕え日記)[Lyrics: Kotoko, Composition/Arrangement: Maiko Iuchi]Jumping Note (うたう♪タンブリング・ダイス)Just As Time Is Running Out (ぎりギリLove)La Clef: Meikyuu no Kagi (迷宮の鍵) (異国迷路のクロワーゼ)[Lyrics: Kotoko, Composition/Arrangement: Maiko Iuchi]Kageri (遮光) (Coda: 棘)[Lyrics: Kotoko, Composition/Arrangement: Tomoyuki Nakazawa]Ketsudan no Entrance (決断のentrance) (Prism Ark らぶ2マキシマム)[Lyrics: Kotoko, Composition/Arrangement: C.G mix]Kimi yo, Yasashii Kaze ni Nare (君よ、優しい風になれ) (とらいあんぐるハート3 リリカルおもちゃ箱)[Lyrics: Maki Tsuzuki, Kotoko, Composition/Arrangement: Kotoko]Kyururun Kiss de Jumbo (きゅるるんKissでジャンボ♪♪) (カラフルハート: 12コのきゅるるん♪)[Lyrics: Kotoko, Composition/Arrangement: C.G mix]Leaf Ticket (パルフェ: ショコラ Second Brew)Lilies Line (チアフル! オリジナルサウンドトラック)Loose (Scarlett)Lupe (陵辱制服女学園: 恥蜜に濡れた制服)Magical Sweetie (お姫さまだっこ: 天使にオシオキ)Mirabilis (B: 蒼き背徳)Mighty Heart: ある日のケンカ、いつもの恋心 (つよきす)Namida no Chikai (涙の誓い) (とらいあんぐるハート3: Sweet Songs Forever)[Lyrics/Composition/Arrangement: Kazuya Takase]Now and Heaven: Kotoko Ver. (淫らな罪: 悦楽の終日)Oblivion (私立レイプ女学院)O*ma*ma*go*to (お*ま*ま*ご*と) (お保母ごと)[Lyrics/Composition: Kotoko, Arrangement: C.G mix]Omoide wa Kaze no Naka de... (想い出は風の中で…) (犠妹: 背徳の契り)[Lyrics: Kotoko, Composition: Kazuya Takase, Arrangement: Atsuhiko Nakatsubo]Omoide wa Kaze no Naka de...: Remix (想い出は風の中で…: Remix) (犠妹: 背徳の契り)[Lyrics: Kotoko, Composition: Kazuya Takase, Arrangement: Atsuhiko Nakatsubo]Onaji Sora no Shita de (同じ空の下で) (家族計画/Kazoku Keikaku)[Lyrics: Momo, Kazuya Takase, Composition/Arrangement: Kazuya Takase]Philosophy: Proto Type Ver. (I've Mania Tracks Vol.1)Princess Brave! (Princess Brave 雀卓の騎士)Princess Bride! (Princess Bride)Raspberry (らずべりー) (らずべりー)[Lyrics: Kotoko, Composition/Arrangement: C.G mix]Repeat: Remix (G-Mix)Resolution of Soul (D+Vine [Luv])Restoration: 沈黙の空 / Restoration: Chinmoku no Sora (Baldrsky)Rime (犠母姉妹)Room (君が主で執事が俺で)Sakuranbo Kiss: Bakuhatsu Damo n (さくらんぼキッス: 爆発だも ん) (カラフルキッス: 12コの胸キュン!)[Lyrics: Kotoko, Composition/Arrangement: C.G mix]Sensitive (犠妹: 背徳の契り)Sensitive: Remix (犠妹: 背徳の契り)Sledgehammer Romance (Princess Bride)Stars Biscuit (ふりフリ: ふつうのまいにちにわりこんできた、フシギなリンジンたちのおはなしおはなし)Swift Love: 健全男子にモノ申す (つよきす2学期)Symphony: 星たちの詩 (Kotoko Live 2006 in Yokohama Arena)Time Heals All Sorrows (Care: 癒すべき不治の狂気)Time Rolls On... (Deep Fantasy)Undying Love (Alma: ずっとそばに…)Undying Love: Remix (Alma Sound Track: ずっと聴いて♪)Unsymmetry (ぎりギリLOVE)We Survive (V.G. NEO)Went Away (夏色の砂時計)Wind of Memory: 記憶の風 (巫女舞: ただ一つの願い)Wing My Way (ファーランドシンフォニー)Ya・Ku・So・Ku (水素: 1/2の奇蹟)Yumemiboshi Boom! Boom! (ユメミボシ: Boom！ Boom！) (ティンクル☆くるせいだーす)[Lyrics: Kotoko, Composition: Tomoyuki Nakazawa, Arrangement: Tomoyuki Nakazawa, Takeshi Ozaki]Zutto Soba ni... (ずっとそばに…) (Alma: ずっとそばに…)[Lyrics: Sakigake, Composition: F-ace, Arrangement: Kazuya Takase]Crash Course: 恋の特別レッスン / Crash Course: Koi no Tokubetsu Lesson (メアメアメア)Prime (Dear Feeling)Save Your Heart (注射器2)Save Your Heart: Album Mix (Lament)Second Flight (おねがい☆ツインズ)See You: 小さな永遠 / See You: Chiisana Eien (とらいあんぐるハート3: Sweet Songs Forever)See You: 小さな永遠 P.V ver. / See You: Chiisana Eien P.V ver. (I've P.V Collection Vol.3)You're My Treasure (Spot Light: 欲望と羨望の狭間)乙女心＋√ネコミミ＝∞ / Otomegokoro Tasu Nekomimi no Heihoukon wa Mugen (王立ネコミミ学園: あなたのための発情期♪)君と夢を信じて / Kimi to Yume wo Shinjite (I-Doll: アイドル)空より近い夢: Second Track / Sora Yori Chikai: Second Track (Dear Feeling)夏草の線路 / Natsukusa no Senro (Railway: ここにある夢)夏草の線路: Album Mix / Natsukusa no Senro: Album Mix (Lament)恋愛Chu！ / Ren'ai Chu! (恋愛Chu!: 彼女のヒミツはオトコのコ?)恋愛Chu！ パラパラリミックス 1 / Ren'ai Chu! Paraparamix 1 (もっとLOVEちゅ!)恋愛Chu！ パラパラリミックス 2 / Ren'ai Chu! Paraparamix 2 (もっとLOVEちゅ!)恋愛Chu！: Remix / Ren'ai Chu!: Remix (Short Circuit)天壌を翔る者たち / Tenjou wo Kakeru Monotachi (Love Planet Five)Bright Wings (とらいあんぐるハート's Sound Stage 5)Inside of a Wilderness (とらいあんぐるハート: Sweet Song Forever)Inside of a Wilderness (Midnight Calling Ver) (Starry Crystal Fiasse Crystela Compilation Album)My Gentle Days (とらいあんぐるハート's Sound Stage X)My Gentle Days (Rhythmic ver) (Starry Crystal Fiasse Crystela Compilation Album)Snow Angel (Onegai Teacher: Stokesia)Sweet Songs Ever with You (とらいあんぐるハート: Sweet Song Forever)ちいさなぼくのうた: Wings Version / Chiis na Boku no Uta: Wings version (とらいあんぐるハート's Sound Stage 2)夢を求めて… / Yume wo Motomete... (コンサドーレ札幌)ワタシはウタがヘタ / Watashi wa Uta ga Heta (誕生日: 通い妻(自称)日記)ワタシはウタがヘタだけど / Watashi wa Uta ga Heta Dakedo (誕生日: 通い妻(自称)日記)The following 5 works are labeled under Outer:
Synthetic Organism (発情カルテ: 緋色の凌辱肉玩具)L.A.M: Laze and Meditation (懲らしめ: 狂育的指導)Leave Me Hell Alone (Devote2: いけない放課後)Dirty Boots (Dirty Gift)Ha!!!ppiness (新妻は魔法少女)From I've:
『prime prototype』 (29th Dec. 2000, in C59) in : prime(Promotion Video)/ prime, (Making of)『I've P.V Collection vol.1』 (29th Dec. 2001, in C61) in : L.A.M: Laze and Meditation (Promotion Video)/ repeat (Promotion Video, and also with Mell on stage)『I've P.V Collection vol.2』 (29th Dec. 2002, in C63) in : 疾風雲 hayategumo (Promotion Video) / 疾風雲 hayategumo, (Making of)『I've P.V Collection vol.3』 (5th Sep. 2003, with I've Special Unit) in : See You: 小さな永遠 (chiisana eien): P.V Mix (Promotion Video) / See You: 小さな永遠 (chiisana eien) P.V Mix, (Making of)/ Aibu Woozu (アイブ ウォーズ)From Geneon Entertainment:
『Kotoko Live Tour 2004 Winter: 冬の雫が連れて来た君が聖者だ (fuyu no shizuku ga tsure kita kimi ga seija da) Happy White X'mas』 (1st Apr. 2005, Geneon Entertainment & I've DVD)With Disc 1 containing : Suppuration: Core, Re-sublimity, Asura, Lament, 羽(hane), Trust You're Truth: 明日を守る約束 (ashita wo mamoru yakusoku), Snow Angel, Imaginary Affair, 地に還る (chi ni kaeru), 覚えてていいよ (oboetete iiyo), Face of Fact, I Pray to Stop My Cry, Shooting Star, Just As Time Is Running Out, and 冬の雫 (fuyu no shizuku)
And Disc 2 containing : きゅるるんkissでジャンボ♪♪ (kyururun kiss de janbo), らずべりー (rasuberii), Short Circuit, メイキング映像 (meikingu eizou, lit. Making of), and インタビュー映像 (intabyuu eizou, lit. Interview Images)
The 『Kotoko Live Tour 2004 Winter: 冬の雫が連れて来た君が聖者だ』DVD is scheduled for a US domestic release on July 4, 2006.
Kotoko 2005 ファンクラブイベントDVD(会報Vol.4)Kotoko 2007 Countdown ファンクラブイベントDVDStarlight Symphony: Kotoko Live 2006 in Yokohama Arena - (released August 29, 2007)Kotoko First Live Tour 2004 ＜羽: Hane＞Kotoko Live Tour 2004: 冬の雫が連れて来た君が聖者だ Happy White X'masKotoko Live Tour 2005: 硝子の靡風I've in Budokan 2005: Open the Birth Gate (October 15, 2005)Kotoko Live House Tour 2006: 日本列島を食い尽くせ!駆け回り食べまくり! (July 20 - August 20, 2006)Kotoko Live in Yokohama Arena (December 1, 2006)Kotoko Band Battle in NagoyaMutant Dwarf Presents Kotoko Countdown Special Live 2006-2007Kotoko Asia Tour 2007 in Taiwan (June 24, 2007)Short Circuit II Premium Show in Tokyo (July 21, 2007)Mutant Dwarf Presents「Dwarfたちの集い♪: 3小節目 ♪」 (July 29 - August 25, 2007)Kotoko Live Tour 2007 Winter (December 21–24, 2007)“thank you”and“from now” KOTOKO LIVE IN BUDOKAN 2010『Pleasure×Pleasure=Pleasure!!!』KOTOKO Live Tour 2011 "Hiraku Uchuu Poketto"KOTOKO ASIA TOUR 2012