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"That idiot won't be in trainee forever unless he get rid of his act!"
- ―Captain Ohkohchi
- ―Katsuto training himself, Ultraman Zearth 2: Superhuman Big Battle - Light and Shadow
|Transformation Item||Pikari Brush/ Pikari Brush 2|
|Home world:||Land of Sparkles|
|First Appearance:||Ultraman Zearth|
|Last Appearances||Ultraman Zearth 2: Superman Big Battle - Light and Shadow|
|Affiliation||MYDO (Mysterious Yonder Defense Organization)|
|Portrayed by||Masaharu Sekiguchi|
Katsuto Asahi is the protagonist in the film Ultraman Zearth and its sequel. The human form of the Ultraman named Zearth, Asahi hails from the Land of Pikari in the Nebula Z95. Coming to Earth to clean the polluted planet Asahi brought with him an incredible hygiene obsession and a fear of dirt. Joining the MYDO, disguised as a gasoline stand, Asahi was relegated to the position of janitor because his fear of dirt interfered with his training stopping him from becoming a full fledged member. However when the team went out Asahi would use the time alone to transform into his true identity Ultraman Zearth.
Asahi is typically dressed in his uniform of a white red striped shirt, grey hat and pants, his MYDO uniform is a red flight suit and helmet.
Ultraman Zearth 2Edit
- Asahi is a human form created by Zearth like Dan Moroboshi.
- Asahi is the first Ultra Hero that needed to brush his teeth to transform, others simply performed an action like waving their hands.
- Asahi is seen by some as the most incompetent of all Ultra hosts. In the first movie he had paralyzing fears of pollution dirt and anything messy in general, and despite joining MYDO he never graduates from training and was relegated to the role of a janitor while other Ultra hosts have become analyzers and mainly pilots. However by the end of the movies he always works to overcome his fears.
|Showa Heroes||Shin Hayata | Dan Moroboshi | Hideki Goh | Seiji Hokuto | Yuko Minami | Kotaro Higashi | Gen Ohtori | Takeshi Yamato | Choichiro Hikari|
|Heisei Heroes||Masaki Kazimori | Jack Shindo | Kenichi Kai | Genki Kagura | Katsuto Asahi | Daigo Madoka | Tsubasa Madoka | Amui | Ginga Yumeboshi | Shin Asuka | Gamu Takayama | Hiroya Fujimiya | Musashi Haruno | Julie | Kaito Touma | Mirai Hibino | Kazuya Serizawa | Ryuu Aihara | Shingo Sakomizu | Jin | Run | Nozomu Taiga | Hikaru Raido | Shou | Daichi Ozora | Gai Kurenai|
|The Ultra Force||Chuck Gavin | Beth O'Brian | Scott Masterson|
|Deunamists||Shunichi Maki | Jun Himeya | Ren Senjyu | Nagi Saijyo | Kazuki Komon|
|Evil Ultra Hosts||Keigo Masaki | Riko Saida | Shinya Mizorogi | Hiroyuki Misawa | Mitsuhiko Ishibori ||
|Other Hero Hosts||Kyotaro Kagami | Goro Kirishima | Daisuke Misaki | Naoki Tachibana | Naoto Sho | Sam Collins | Ai Kumasiro | Akira Kageyama | Nao | Tomoya Ichijouji|