- Country: Japan
- Genres: Adventure, Animation, Short
- Release: 2014-10-01
- Director: Hiroyasu Ishida
- Writers: Junichi Tanaka
- Language: Japanese
- Stars: Fuyuka Ono , Ryoko Shiraishi , Sayuri Sadaoka , Aimi Tanaka , Isamu Yusen , Ayako Takeuchi , Miyuki Satô , Aki Kaneda
- Runtime: 11 min
- Awards: N/A
- AKA: Fastening Days (Japan)
- Plot: Yoji and Kei become two kid superheroes that use YKK zippers to help people, solve problems and 'fasten' their family relationship.
- IMDB:tt5348014
Fastening Days Cast · · · ALL
Hiroyasu Ishida
Director
Fuyuka Ono
Yoji (voice)
Ryoko Shiraishi
Kei (voice)
Sayuri Sadaoka
Anna (voice)
Aki Kanada
Male Student A (voice)
Isamu Yusen
Husband (voice)
Junko Takeuchi
Wife (voice)
Miyuki Satou
Girl (voice)