Kaiju No. 8's Narumi's Week at Work Begins September 5

Official visual for Kaiju No. 8 short anime Narumi's Week at Work

Kaiju No. 8 is returning with a compact, character-focused release rather than another full season episode. The official Japanese anime site lists Narumi's Week at Work, an original short anime centered on Gen Narumi, as beginning on September 5, 2026. It is scheduled to roll out as four episodes, with the Japanese site naming a Saturday 8:00 p.m. JST slot through the TOHO animation YouTube channel and other services. Amazon Japan’s official September line-up separately lists the short for Prime Video in Japan on the same date.

That is a useful distinction for viewers planning their weekend: the announcement confirms a Japanese release route and a four-part schedule, but it does not yet confirm a matching release time, subtitle package, or platform availability outside Japan. The official English site already identifies the first installment as Day 1, “The Platoon Leader’s Real Feelings,” while its streaming section currently promotes Seasons 1 and 2 rather than setting out an international plan for the new shorts.

What Was Announced

The project is an original short-anime series, not a newly announced third television season. The Japanese official site calls it Narumi's Week at Work and places it alongside the main anime’s existing streaming information. Its listed schedule is “from September 5, every Saturday at 8:00 p.m.” in Japan, with four episodes planned. The site specifically names the TOHO animation YouTube channel and says it will also be available through other outlets; it cautions that start times can differ by service.

TOHO’s own anime line-up also lists the project as a streaming anime beginning September 5. Amazon Japan’s official monthly Prime Video announcement includes Kaiju No. 8 original short anime Narumi's Week at Work under Japanese TV animation for September 5. Taken together, those primary sources establish the date, the four-episode short format, and at least one named domestic streaming destination.

Gen Narumi is a fitting subject for a side project because he is presented in the series as the Defense Force’s strongest fighter. The official English site credits Koki Uchiyama as Narumi and labels the first episode “The Platoon Leader’s Real Feelings.” Beyond that title, the currently published official material does not provide a full English episode synopsis, running time, or a complete episode-by-episode release calendar. Those details should not be assumed from the format alone.

Why It Matters

This is a deliberately smaller release with a clear character lens. Instead of treating a short as filler between large story arcs, the official presentation gives Narumi a named four-episode run and a separate episode area on the series site. For fans who know him primarily through high-stakes Defense Force scenes, the premise may create room for material that the main serialized story does not dwell on. That is an inference from the title and format, not a confirmed description of the plot.

The project also shows how an established anime can keep a character present between larger releases without asking audiences to commit to another full cour. Four weekly drops make the schedule easy to follow, and the named YouTube route lowers the barrier for viewers who can access that channel. Whether it will play as a comedy, a character study, or a mix of both has not yet been officially detailed, so expectations should stay tied to the announced title rather than fan assumptions.

Context for International Fans

The stated Japanese schedule converts to 4:00 a.m. Pacific Daylight Time, 7:00 a.m. Eastern Daylight Time, noon in the United Kingdom during British Summer Time, and 1:00 p.m. Central European Summer Time. Those conversions are practical reference points for the listed 8:00 p.m. JST Saturday slot; they are not an official overseas simulcast timetable.

Most importantly, neither the Japanese scheduling text nor the official English page currently supplies a territory-by-territory release list for the new short. Amazon Japan’s notice confirms the title in its Japan catalogue, but does not establish Prime Video availability in other regions. International viewers should therefore avoid assuming that a Season 1 or Season 2 service will automatically carry this project. Subtitle and dub availability are likewise not yet confirmed in the sources below.

The official English site remains the best first stop for an English-facing update: it has a dedicated Narumi episode tab and lists the first episode’s English title. If its streaming page changes to name an international service, that will be stronger evidence than a search result, reposted schedule, or social-media screenshot.

What Happens Next

On September 5, fans can check the official Kaiju No. 8 site and the TOHO animation channel for the first episode, then watch for the next Saturday installments in the four-episode run. The specific items to verify are whether the YouTube upload is viewable in a viewer’s country, whether captions are offered, and whether an official regional distributor publishes a separate schedule. A platform listing, runtime, or additional cast announcement may appear after the launch, but none of those points is confirmed here unless it appears in an official update.

Sources

Information was checked on September 5, 2026, at 5:45 a.m. JST.

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