Doga Kobo and Crunchyroll confirmed season 4 of Oshi no Ko is in development and will stream worldwide, and the announcement also noted this will be the final season of the anime adaptation. There’s no release window for it yet. However, there is a key visual that shows Ai, Aqua, and Ruby Hoshino and a first teaser trailer for the end of the series.
Since the third season of Oshi no Ko is now over and its eleventh episode is live, we know exactly what arcs from the manga will be represented in the final episodes of season 4. From the eighth episode on, the Movie arc started. This means the fourth season will basically cover about two and a half. It will begin at the end of that storyline and adapt all of The End of the Play, and Toward the Stars and Dreams.
Here’s the trailer teasing that:
And the key image showing the twins and their mother:

This will mean every season of the Oshi no Ko anime will be streaming on Crunchyroll. That series started out as a HIDIVE exclusive for its first two seasons. With season 3, it showed up on Sony’s streaming service. When that happened, the first also ended up added to that library, and the second season is now also there.
Season 4, which is Oshi no Ko Final Season, is in development and will stream on Crunchyroll. Seasons 1 and 3 of the Oshi no Ko anime are on Crunchyroll, while HIDIVE offers all of them available so far. Yen Press handles the manga outside Japan. The live action show is on Amazon.
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