Chiikawa just pulled off the unthinkable. The tiny, tear-prone mascots from Nagano's X comics now own Japan's 2026 box office. As of September 20, day 59 in theaters, Chiikawa the Movie: The Secret of the Mermaid Island had earned ¥15.84 billion from 10.857 million tickets, passing Detective Conan: Fallen Angel of the Highway as the year's highest-grossing Japanese release. Yes, the cute little guy out-muscled Conan. Day one alone brought in ¥990 million, narrowly beating the opening day of Detective Conan: The Million-Dollar Pentagram. South Korea got the film at the end of September, and it pulled about 463,000 viewers in four days.
Why does this matter? Because Chiikawa started in 2020 as scribbles on X and ballooned into books, merch walls, a TV anime and even a theme park. A feature film was the last big box left unchecked. Kei Oikawa directed at Cygames Pictures, and Nagano wrote the screenplay personally, adapting the Mermaid Island arc. That's the 2023 Siren arc. The setup is simple. Chiikawa, Hachiware and Usagi chase a flyer promising hundredfold bounties and free ramen. Obviously a trap. It's a Chiikawa flyer, come on.
Social media in 2026 is split between cozy and traumatized. Plenty of Japanese viewers went in expecting a heartwarming cute-character story and found something very different. Reports say lots of people who never touched the manga or anime bought tickets thanks to the film's exposure and the merch. Freebies keep feeding repeat viewings, with five waves of ticket bonuses so far. Then there's 4DX in 65 theaters and shout-along screenings. Not everyone is sold, though. One reviewer thinks the film leans too hard on sugary songs to pad the runtime. Fair knock. Meanwhile, fans keep arguing over what the island is really hiding, and the creditless opening cut set to "Kutsuzure" hasn't helped anyone sleep.
So what should you actually expect? The run will slow but not stop. My guess is a finish somewhere in the high teens of billions of yen, with more overseas openings stacked on top. It hit ¥10 billion in 30 days, slower than Demon Slayer and Conan managed, so don't expect record-shattering mania from here. A home release will come eventually, but nobody has dated one. India? I couldn't find an announced theatrical date, so don't hold your breath for a local screen yet. A sequel film is pure fan wishcasting for now. Still, a franchise this hot rarely stops at one swing, so keep an eye on Nagano's X account.
