Fastening Days 4

Where to watch Fastening Days 4 in Mexico

Fastening Days 4 isn't available to stream, rent or buy in Mexico right now. Availability changes often, so check back soon. Availability checked 25 May 2026.

About Fastening Days 4

Fastening Days 4 is a 2019 web series in the Animation genre, starring Fuyuka Ono, Ryoko Shiraishi and Akemi Kanda. It spans 1 season and 3 episodes, and originally aired on YouTube. It holds an average rating of 6.0/10 from 2 viewers. Below you can see where to watch Fastening Days 4 in Mexico — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.

Overview

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)

• Season 13 episodes · 2019

Top cast

Fuyuka Ono

Yoji (voice)

Ryoko Shiraishi

Kei (voice)

Akemi Kanda

Kelly (voice)

Sayuri Yahagi

Samhen (voice)

Rie Kugimiya

Jack (voice)

Ami Matsushima

Samhen's mother (voice)

Hikaru Akao

Girl 1 (voice)

Hana Sato

Girl's mother (voice)

Yasunao Sakai

Man 1 (voice)

Naoya Nakanishi

Man 2 (voice)

Yuu Ayase

Child (boy) (voice)

Saya Hirose

Teacher (voice)

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