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Fastening Days 4

Name: Fastening Days 4
Director: Shingo Yamashita
Genre: Animation
Released: 2019-12-05
Rating: 6.0

FASTENING DAYS 4

Animation

Watch Free

We checked 8 streaming services in India on 04 Jun 2026 at 16:57 IST

2019

1 Season

3 Episodes

Ended

About

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!

Cast

Fuyuka Ono

as Yoji (voice)

Ryoko Shiraishi

as Kei (voice)

Akemi Kanda

as Kelly (voice)

Sayuri Yahagi

as Samhen (voice)

Rie Kugimiya

as Jack (voice)

Ami Matsushima

as Samhen's mother (voice)

Hikaru Akao

as Girl 1 (voice)

Hana Sato

as Girl's mother (voice)

Yasunao Sakai

as Man 1 (voice)

Naoya Nakanishi

as Man 2 (voice)

Yuu Ayase

as Child (boy) (voice)

Saya Hirose

as Teacher (voice)

Seasons

Season 1

3 episodes2019

Episodes

Season 1

Where does Fastening Days 4 rank today?

Fastening Days 4 is #5867 on the CineFlixo Daily Streaming Charts today.

Highest: #5867
Top 10: 0 days
Top 100: 0 days

Watch Fastening Days 4 Online Free — All Episodes in HD

Looking for a place to watch Fastening Days 4 online for free? You've landed on the right page. Fastening Days 4 is a popular Japonés animation series from 2019 that you can stream right now on CineFlixo in high quality, no signup required.

About Fastening Days 4

Fastening Days 4 Cast and Characters

The cast features Fuyuka Ono (as Yoji (voice)), Ryoko Shiraishi (as Kei (voice)), Akemi Kanda (as Kelly (voice)), Sayuri Yahagi (as Samhen (voice)), and Rie Kugimiya (as Jack (voice)). Their performances are a major reason Fastening Days 4 has built such a passionate audience.

Where to Watch Fastening Days 4 Online

CineFlixo lets you stream Fastening Days 4 online free, instantly, in HD. There's nothing to install — open the page, hit play, done. Works perfectly on Jio, Airtel, Vi networks across India and on slow mobile data thanks to our adaptive video pipeline.

▶ Watch Fastening Days 4 Now

Why People Are Watching Fastening Days 4

Fastening Days 4 flies under the radar but it deserves your attention. What makes it work is a tone and style that's hard to find elsewhere. If you enjoy Japonés storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.

Frequently Asked Questions about Fastening Days 4

Where can I watch Fastening Days 4 online for free?

You can watch Fastening Days 4 online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.

How many episodes does Fastening Days 4 have?

Fastening Days 4 has 3 episodes across 1 season. All episodes are available to stream right here on CineFlixo.

Is Fastening Days 4 good? What's the rating?

Fastening Days 4 holds a 6.0/10 rating based on 2 reviews — a solid pick if the genre interests you.

Who is in the cast of Fastening Days 4?

The main cast includes Fuyuka Ono, Ryoko Shiraishi, Akemi Kanda, and Sayuri Yahagi, plus a strong supporting ensemble.

Is Fastening Days 4 available in Japonés?

Yes — Fastening Days 4 was originally produced in Japonés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.

When was Fastening Days 4 released?

Fastening Days 4 first aired in 2019.

Do I need an account to watch Fastening Days 4 on CineFlixo?

No. CineFlixo is free and you can watch Fastening Days 4 without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.

Frequently Asked Questions

Where can I watch Fastening Days 4 for free?

You can watch Fastening Days 4 online for free on CineFlixo. All 3 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.

How many seasons and episodes does Fastening Days 4 have?

Fastening Days 4 currently has 1 season and a total of 3 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on CineFlixo and continue watching from where you left off.

What is Fastening Days 4 about?

In which language is Fastening Days 4 originally available?

Fastening Days 4 was originally produced in JA. On CineFlixo the show is available in its original JA audio. Check the player options on the watch page for available subtitle tracks.

When was Fastening Days 4 first released?

Fastening Days 4 first premiered on December 5, 2019 (2019). The series has since concluded its run.