|This article is about a/an episode in Kamen Rider Den-O.|
Time Traveler, Kohana (タイムトラブラー・コハナ Taimu Toraburā・ Kohana) is the thirty-third episode of Kamen Rider Den-O.
The Den-Liner crew discover an anomaly associated with the missing future as Hana suddenly transforms into a young girl.
Ryotaro calls Yuka while she is back at the university in England, and the subject of her previous visit to Japan comes up. When Ryotaro asks her about Sakurai, she cannot remember anything. On the DenLiner, the Tarōs and Naomi see a twisted and damaged track, and the Owner reveals that a new line is being opened with a change about to occur. Just then, Momotaros realizes that Hana is not there when he and others were checking themselves for changes. Elsewhere, Hana finds herself turned into a young child. The next day, Ryotaro receives a call from Hana and goes to meet her, astonished by her current form. When he brings her to the Milk Dipper, and Airi asks who she is, Ryotaro quickly comes up with the name "Kohana" and that Kohana is Hana's younger sister. In town, a tuxedo-wearing man, visiting various places with pianos, sits down at them and starts playing a song. While playing at a restaurant, he opens a contract with the Kraken Imagin. Yuto notices the contracting and goes to get Ryotaro while Deneb watches over the contract holder. The Imagin attacks a young girl practicing piano and steals the piano as Yuto finds Ryotaro and discovers Hana's current state. Ryotaro goes to find Deneb while Yuto takes Hana on the DenLiner. Deneb follows the man to a hospice where the Kraken Imagin gives its contract holder the stolen piano. The Imagin thinks that the contract is complete by granting the man's wish for the piano, but the contractor disagrees. The Imagin proceeds to attack the Piano Man, but Deneb intervenes by using his Nova abilities and gets the mysterious pianist away from the Kraken Imagin until Den-O Sword Form arrives. The fight ends in a draw due to Den-O Sword Form's stalling because Momotaros doesn't know which final attack he should use and the Imagin escapes. When Ryotaro and Deneb try to find the contractor, he is playing the piano the Imagin brought him. Back on the DenLiner, the Owner shows Yuto and Hana the twisted set of tracks, which he speculates to represent the original time period of both the ZeroLiner and Hana herself.
- Den-O: Sword 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)
- Yuka Sawada (沢田 由香 Sawada Yuka): Hikari Mitsushima (満島 ひかり Mitsushima Hikari)
- Yuki Okumura (奧村 祐希 Okumura Yūki): Shinji Ozeki (尾関 伸嗣 Ozeki Shinji)
- Pianist: Taro Suwa (諏訪 太朗 Suwa Tarō)
- Nurse: Hiyori Iizuka (飯塚 ひより Iizuka Hiyori)
- Gangs: Kuniaki Kogure (小暮 邦明 Kogure Kuniaki), Keigo Kitamura (北村 圭吾 Kitamura Keigo)
- Clerk: Naomi Matsuyama (松山 直美 Matsuyama Naomi)
- Waiter: Mineaki Torii (鳥居 峰明 Torii Mineaki)
- Girl: Sakura Ishiura (石浦 桜 Ishiura Sakura)
- 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 29, Lesson 29: Guda-Guda Here-Here! Shopping.
- Viewership: 7.6%
Blu-ray Box 2 comes with 18 episodes.