Quick Answer
Under Ninja is streaming on Crunchyroll, Bahamut Anime Crazy. 12 episodes (~5h total watch time). Availability may vary by region.
Where to Watch Under Ninja
Good news — Under Ninja has official streams on Crunchyroll and Bahamut Anime Crazy. We've got links for all of them, along with fallback search options.
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About Under Ninja
Once believed to be extinct, ninjas have reappeared in contemporary Japan following the Pacific War. With a headcount rumored to be two hundred thousand, these deadly assassins are now tasked with covert operations, infiltrating a significant portion of the nation's public and private institutions in the process. Among these ninjas is Kurou Kumogakure, who often spends his days in a run-down apartment with no motivation to do much of anything. Some might consider him a useless vagrant who...
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Under Ninja legally?
Right now, Under Ninja is on Crunchyroll, Bahamut Anime Crazy. That said, anime licensing varies a lot by country — what's on Netflix in Japan might not be on Netflix in the US. If your go-to platform doesn't have it, try the other services listed above.
Is Under Ninja on Netflix or Crunchyroll?
It's confirmed on Crunchyroll. Netflix availability depends on your region — some countries have it, others don't.
Is Under Ninja available with an English dub?
Dub availability depends on the platform. Crunchyroll has been expanding their dubbed library a lot recently, and Funimation (now merged into Crunchyroll) historically had the biggest dub catalog. Check each platform's listing for Under Ninja.
Can I watch Under Ninja for free?
Crunchyroll offers a free ad-supported tier for some shows. Most other platforms require a subscription, but many offer free trials for new users. Tubi and Pluto TV occasionally have anime in their free rotation too.