|This article is about a/an episode in Kamen Rider Den-O.|
Resolution of a Single-Action (決意のシングルアクション Ketsui no Shinguru Akushon) is the forty-fourth episode of Kamen Rider Den-O.
With Ryotaro continuing to deny the help of the Imagin out of fear of losing them, Momotaros decides to take a stand while the others deal with the stowaway Imagin in the King Terminal.
After learning the horrible truth behind his losing sync with the Tarōs, Ryotaro wants nothing more to do with them anymore. The other Tarōs have to restrain an enraged Momotaros while Ryutaros is speechless. Once at the Time Station, Urataros and Kintaros take Momotaros to calm him down as he leaves, still hurt about Ryotaro's choice. While Yuto helps Ryutaros in understanding Ryotaro's position, Hana goes back to the present to get advice from Airi on her feelings for the Taros. Back at the Time Station, Urataros and Kintaros see the Armadillo Imagin as he's about to attack, holding him off as Ryutaros arrives to back them up. Ryotaro is on his way when Momotaros halts him, forcing Ryotaro to fight him to prove he has what it takes to fight on his own. But Ryotaro admits that he is afraid of losing the Tarōs, but knows he must fight to protect time. Understanding Ryotaro now, Momotaros apologizes for not being honest about the recent events, revealing that he wants to protect the present as well along with the other Tarōs. With that, the two hurry to the others' aid, with the Den-O team back together. Going through each default form, Den-O overwhelms the Armadillo Imagin until assuming Climax Form to finish the fight. Soon after, on the DenLiner, Naomi set up a meal Kohana made to celebrate the Tarōs staying with the team as Owner to Ryotaro reveals the final battle is about to begin. Back in the present, Kai is fixated on why Yuto saved Ryotaro instead of Sakurai, realizing that there's something else he had forgot and Ryotaro is somehow tied to it.
- Den-O: Plat Form, Sword Form, Rod Form, Axe Form, Gun Form, Climax 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)
- Kai (カイ Kai): Hideo Ishiguro (石黒 英雄 Ishiguro Hideo)
- 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)
- Past Man (過去の男 Kako no Otoko): Tomonobu Okano (岡野 友信 Okano Tomonobu)
- Clerk: Eri Terashima (寺島 栄里 Terashima Eri)
- Armadillo Imagin (アルマジロイマジン Arumajiro Imajin, Voice): Wataru Takagi (高木 渉 Takagi Wataru)
- Albinoleo Imagin (アルビノレオイマジン Arubinoreo Imajin): Takaya Kuroda (黒田 崇矢 Kuroda Takaya)
- 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)
- Albinoleo Imagin: Norihito Itō (伊藤 教人 Itō Norihito)
- Armadillo Imagin: Satoshi Fujita (藤田 慧 Fujita Satoshi)
- As part of Super Hero Time, this episode aired alongside Juken Sentai Gekiranger episode 41, Lesson 41: Zushi-Zushi! No More.
- Viewership: 6.8%
Blu-ray Box 3 comes with 13 episodes.