TV series
Fastening Days 4
2019, Japanese, on YouTube.
Yoji, Kei, Kelly, and the bear-shaped robot Oscar save the town yet again using Fastening Machines! This time, they meet a kindhearted young boy named Samhen and his AI robot Jack. Shy Samhen, who transfers into Kei and Kelly's class, doesn't seem to like talking about himself much, but his chatty little buddy Jack is more than happy to help him communicate. One peaceful afternoon, the young heroes must protect the town from sudden and serious danger! Will they be able to save everyone? Pay attention to the bond between AI and humans, which the children take action to protect!
- Seasons
- 1
- Episodes
- 3
- Episode length
- 3 min
- Status
- Ended in 2019
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Where to watch Fastening Days 4
Fastening Days 4 isn’t listed on any OTT platform in India yet.
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Latest episode
S1 E3: Episode 3
Aired 26 December 2019
Seasons 1
Cast & crew
- Fuyuka OnoYoji (voice) · 3 ep
- Ryoko ShiraishiKei (voice) · 3 ep
- Akemi KandaKelly (voice) · 3 ep
- Sayuri YahagiSamhen (voice) · 3 ep
- Rie KugimiyaJack (voice) · 3 ep
- Ami MatsushimaSamhen's mother (voice) · 3 ep
- Hikaru AkaoGirl 1 (voice) · 3 ep
- Hana SatoGirl's mother (voice) · 3 ep
- Yasunao SakaiMan 1 (voice) · 3 ep
- Naoya NakanishiMan 2 (voice) · 3 ep
- Yuu AyaseChild (boy) (voice) · 3 ep
- Saya HiroseTeacher (voice) · 3 ep
Details
- First aired
- 5 December 2019
- Last aired
- 26 December 2019
- Network
- YouTube
- Original title
- FASTENING DAYS 4
- Language
- Japanese
- Country
- Japan
- Type
- Miniseries
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News & fan talk
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Fastening Days 4: quick answers
Is Fastening Days 4 worth watching?
Fastening Days 4 doesn’t have enough ratings for a verdict yet.
How many seasons of Fastening Days 4 are there?
Fastening Days 4 has 1 season and 3 episodes, about 3 minutes each.
Is Fastening Days 4 finished?
Yes. Fastening Days 4 ended in 2019, so you can watch the whole story.
Which OTT platform is Fastening Days 4 on?
Fastening Days 4 isn’t listed on any OTT platform in India yet. (Checked 9 November 2026.)
Fastening Days 4 parents guide: is it suitable for kids?
No age rating is listed for Fastening Days 4 yet.
What shows are like Fastening Days 4?
If you liked Fastening Days 4, try Red Baron, Rugrats, Generator Rex.