|This article is about a/an episode in Kamen Rider Den-O.|
The Time Interval Pianist (時の間（はざま）のピアニスト Toki no Hazama no Pianisuto) is the thirty-fourth episode of Kamen Rider Den-O.
Ryotaro works to try and figure out the mystery of the wandering piano player and what his true wish is before his Imagin can complete its desire.
The Kraken Imagin escapes without Ryotaro and Deneb figuring anything out about the Piano Man and his wish. Ryotaro and Yuto follow him to the hospice, where a young man named Okamura has been in a coma for over three years. When D-Yuto and U-Ryotaro go to his room, they learn of what happened, seeing the Piano Man staring at the same room, idly playing a piano in his mind until a police officer takes him away. Before Urataros can woo the nurse, Kohana arrives to take both him and D-Yuto away. U-Ryotaro and Kohana follow the Piano Man, learning that he is not remembered by anyone else. Ryotaro finds Yuto watching the Piano Man, revealing what he learned is similar to Sakurai. When the Kraken Imagin arrives with another stolen piano for his contract, Ryotaro transforms into Den-O Rod Form and fights until Piano Man's playing for Okamura completed the contract. The Kraken Imagin proceeds to travel to January 18, 2004, the day the Piano Man and Okamura first met, with Okamura's intent to becoming a pro before he ended up in his coma. Rod-Form pursues the Kraken Imagin, defeating him as the Imagin then reforms into several Gigandeath Heavens and Hells, which destroy nearly everything in the timeline. Using all of the time trains, an infuriated Den-O defeats the monsters, bringing everything back to normal, except for the Piano Man, as he has no place in the memories of others. When Ryotaro laments about this on the DenLiner, the Piano Man comes aboard with a Rider Ticket from January 18, 2004, as he is revealed to be a time wanderer until he is remembered by Okamura.
- Den-O: Rod Form
- Ryotaro Nogami (野上 良太郎 Nogami Ryōtarō): Takeru Satoh (佐藤 健 Satō Takeru)
- Kohana (コハナ Kohana): Tamaki Matsumoto (松元 環季 Matsumoto Tamaki)
- Yuto Sakurai (桜井 侑斗 Sakurai Yūto): Yuichi Nakamura (中村 優一 Nakamura Yūichi)
- Naomi (ナオミ Naomi): Rina Akiyama (秋山 莉奈 Akiyama Rina)
- Airi Nogami (野上 愛理 Nogami Airi): Wakana Matsumoto (松本 若菜 Matsumoto Wakana)
- Seigi Ozaki (尾崎 正義 Ozaki Seigi): Akira Nagata (永田 彬 Nagata Akira)
- Issē Miura (三浦 イッセー Miura Issē): Ryo Ueno (上野 亮 Ueno Ryō)
- Momotaros (モモタロス Momotarosu, Voice): Toshihiko Seki (関 俊彦 Seki Toshihiko)
- Urataros (ウラタロス Uratarosu, Voice): Kōji Yusa (遊佐 浩二 Yusa Kōji)
- Kintaros (キンタロス Kintarosu, Voice): Masaki Terasoma (てらそま まさき Terasoma Masaki)
- Ryutaros (リュウタロス Ryūtarosu, Voice): Kenichi Suzumura (鈴村 健一 Suzumura Ken'ichi)
- Deneb (デネブ Denebu, Voice): Hōchū Ōtsuka (大塚 芳忠 Ōtsuka Hōchū)
- Owner/Opening Narration (オーナー／オープニングナレーション Ōnā/Ōpuningu Narēshon): Kenjirō Ishimaru (石丸 謙二郎 Ishimaru Kenjirō)
- Yuki Okumura (奧村 祐希 Okumura Yūki): Shinji Ozeki (尾関 伸嗣 Ozeki Shinji)
- Piano Man: Taro Suwa (諏訪 太朗 Suwa Tarō)
- Nurse: Hiyori Iizuka (飯塚 ひより Iizuka Hiyori)
- Kraken Imagin (クラーケンイマジン Kurāken Imajin, Voice): Tetsu Inada (稲田 徹 Inada Tetsu)
- Kamen Rider Den-O/Momotaros: Seiji Takaiwa (高岩 成二 Takaiwa Seiji)
- Urataros: Eitoku (永徳 Eitoku)
- Kintaros: Jirō Okamoto (岡元 次郎 Okamoto Jirō)
- Ryutaros: Toshihiro Ogura (おぐら としひろ Ogura Toshihiro)
- Kamen Rider Zeronos: Makoto Ito (伊藤 慎 Itō Makoto)
- Deneb: Yoshifumi Oshikawa (押川 善文 Oshikawa Yoshifumi)
- Kraken Imagin: Norihito Itō (伊藤 教人 Itō Norihito)
- As part of Super Hero Time, this episode aired alongside Juken Sentai Gekiranger episode 30, Lesson 30: The Sei-Sei de Dou-dou Woman.
- Viewership: 7.4%
Blu-ray Box 2 comes with 18 episodes.