Are There Cat Ninja Manga Spin-Offs Or Side Stories?

Quick takeaway: yes — but mostly in small, playful formats rather than tons of big mainstream series. I’ve found cat-ninja concepts in one-shots, 4-koma gag strips, doujinshi circles, and occasional chibi spin-offs tied to larger properties. They pop up as webcomics and limited-edition extras more than long weekly serials, though a handful of indie creators build full stories around feline shinobi.

If you want examples that lean into the same vibe, I’d point to anthropomorphic cat-warrior works like 'Nekogahara: Stray Cat Samurai' for tone (even if it’s more samurai than ninja) and keep an eye on Pixiv and convention booths for true cat-ninja one-offs. I love how playful and inventive those tiny stories are — they often pack more charm in a few pages than some big epics do, which is why I keep collecting them.

Short and playful from my end: yes, there’s plenty of cat‑ninja content, but most of it is playful spin‑offs or indie comics rather than long mainstream runs. Apart from 'Nekogahara: Stray Cat Samurai' (a proper manga that scratches the same itch), you’ll see tons of fan strips, merch, and game crossover comics where cats wear masks, throw kunai, or sneak through alleyways.

If you like quirky one‑shots and chibi art, that’s where the fun lives — the community keeps inventing new cat ninja variations all the time. I keep a folder of my favorites and they always make me smile.

Totally into this little niche — I get asked about cat-ninja stuff all the time. There are a surprising number of cat-ninja spin-offs and side stories, but they don’t always come as full serials; a lot of them live in one-shots, omakes, gag strips, and doujinshi. For example, if you like anthropomorphic samurai/cat-warrior vibes, check out 'Nekogahara: Stray Cat Samurai' — it’s not strictly ninja-focused, but it scratches that same itch of feline warriors, and it’s proof publishers will greenlight animal-centric period pieces. Bigger franchises will also occasionally publish chibi or animalized bonus comics where characters become cats with ninja traits, and those tend to pop up in special editions or fanbooks.

When I hunt for these, I dive into Pixiv tags, Comiket circles, and the back pages of magazine anthologies. You’ll find short serialized strips in 4-koma format, playful crossover doujinshi, and webcomic one-offs that riff on the ninja aesthetic. Indie creators love the concept because a stealthy cat is both visually cute and easy to gag-slap into a pratfall, so there are tons of webcomics and indie manga with cat-ninja protagonists. I’ve even seen cat-ninja designs show up as mascots in mobile games and indie platformers, which then spawn short manga-style comics.

If you want something longform, full serials are rarer, but there are ongoing web manga and indie titles that expand into longer arcs if they gain traction. I love that mix of silly and atmospheric — comfy, sly, and occasionally vicious — so I keep an eye on creators who blend ninja tropes with feline body language. Gives me a goofy smile every time I find a new one, honestly.

If you like quick, cute reads, you’ll find a lot of cat-ninja side stories scattered around the web and in fan culture. I spend a lot of downtime scrolling through indie strips, and the trend shows up as short gag manga, character spin-offs, or festival doujinshi. These are the kinds of pieces that don’t always get printed in big magazines but live on creators’ online pages or at conventions. Creators will often do a ‘what if our ninja were cats?’ strip as an extra, and sometimes that spark grows into a mini-series.

I’ve spotted cat-ninja characters as bonuses in artbooks and drama CDs, too — little comics tucked into limited editions where canon is played with and everyone gets turned into animals for fun. There's also the crossover appeal in indie games and mobile apps where cat-ninja skins or side stories expand the universe. For hunting them down, I search for Japanese tags like '猫忍' and artist circles that focus on animalized characters. It’s a neat rabbit hole; playful, sometimes absurd, and great for a short commute read. I always come away grinning at how creative people get with stealth, paws, and tiny swords.

When I dig into this niche from a collector’s perspective, I notice two clear veins: official small‑press works and a massive fan/doujin culture. On the official side, 'Nekogahara: Stray Cat Samurai' stands out as a serious manga that channels feudal Japan through feline protagonists, and it’s where many people point first if they want a produced, cohesive story about warrior cats. It reads like a samurai noir, but many scenes and character types overlap with ninja tropes — stealth, assassins, covert clans — so fans often tag it in that category.

The rest of the ecosystem is less formal but abundant. Doujinshi creators, webcomic artists, and even game developers love turning shinobi into cats for humor and merchandising. Mobile games like 'The Battle Cats' churn out concept art that creators then expand into comics and side stories, some of which are serialized on Pixiv or self‑published at comic markets. Folklore elements, like bakeneko and nekomata, also get woven into ninja narratives, giving these spin‑offs a supernatural flavor that I find endlessly collectible and fascinating.

I'm wildly into weird spin-offs, and cat-ninja mashups are one of my favorite niche corners. If you want an official, polished example, check out 'Nekogahara: Stray Cat Samurai' — it’s a proper manga that gives felines a samurai/ronin vibe, and while not strictly 'ninja' in every chapter, it sits squarely in the same anthropomorphic warrior tradition. The tone is gritty, stylized, and has that Edo‑period feel where stealthy, blade‑wielding cats could absolutely fill the role of shadowy ninjas.

Outside of full serials, a surprising amount of this material lives in doujinshi, 4‑koma strips, and gag manga. Popular ninja franchises (and even mainstream shonen characters) often get catified in fan comics — people redraw shinobi as bouncy, sneaky cats for humor or slice‑of‑life spins. You’ll also see licensed or indie illustrators do short side stories where a secondary cat character is reimagined as a ninja for a chapter or special.

If you like the game angle, mobile titles such as 'The Battle Cats' pack dozens of themed cat units that include ninja and samurai archetypes, which then inspire fan manga and short comics. I love hunting through Pixiv and Comiket catalogs for these tiny gems; they’re charming, silly, and occasionally unexpectedly deep — total comfort reads for me.

Okay, quick and chatty take: yes, there are cat‑ninja spin‑offs, but most of them aren’t huge weekly manga series — they live in indie works, doujinshi, and one‑off strips. One clear commercial example is 'Nekogahara: Stray Cat Samurai' which gives you warrior cats in a historical setting; it scratches that same itch even if it leans more samurai than purely ninja.

The rest is a riot of fan art, short manga extras, and game tie‑ins. I’ve seen tons of 4‑panel comics where a regular ninja gets swapped into a cat body, or where famous shinobi suddenly have cat ears and sneak around alleys. If you enjoy quirky side stories, those fan circles are a goldmine — they do everything from dark reboots to absurd comedy, and the variety keeps me coming back for more.