by The first Chiikawa movie, Chiikawa: The Secret of the Mermaid Island, has released its second official LINE sticker set, giving fans a new way to enjoy memorable moments from the hit theatrical film.
Unlike the first sticker collection, which consists of still images, the second set features animation, character voices, and sound effects. The stickers include memorable expressions and lines from the movie, allowing fans to bring some of the film’s most recognizable moments into their everyday LINE conversations.
The second set became available on September 17, 2026, just two days after the first official movie sticker collection launched on September 15. The two releases give fans both static and animated options based on the movie’s popular Siren Arc.
The new merchandise-style digital release comes as Chiikawa: The Secret of the Mermaid Island continues its impressive theatrical run. As of September 13, the movie had attracted 10 million viewers in Japan and earned ¥14.66 billion at the box office after 52 days in theaters.
Second Chiikawa Movie LINE Sticker Set Is Now Available
The official LINE sticker set No. 2 from Chiikawa: The Secret of the Mermaid Island is now available.
The stickers feature animated scenes along with character voices and sound effects, making them different from ordinary static LINE stickers.
The collection uses memorable moments and dialogue from the movie’s Siren Arc, giving fans the opportunity to use recognizable scenes from the theatrical story when chatting with friends and family.
Some of the expressions featured in the promotional material include popular reactions from characters such as Chiikawa, Hachiware, and Usagi, while the collection also captures some of the unusual and comedic moments that made the film popular.
Because the stickers include animation and audio, they offer a more interactive way to revisit the movie compared with conventional character stickers.
The First LINE Sticker Set Arrived Two Days Earlier
The second sticker release follows the launch of the movie’s first official LINE sticker set, which became available on September 15, 2026.
The first set focuses on still-image stickers featuring expressions and memorable lines from the Siren Arc.
Examples highlighted in reports include lines and moments such as Chiikawa’s famous reaction “Nantoka Nare!!!”, Shimajiro’s “Today is already over!”, and the Siren’s reaction to food. The first collection also includes a simple sticker featuring the word “Nitsuke”.
The first set also supports LINE’s sticker arrangement feature, allowing users to combine multiple stickers in creative ways.
Together, the first and second collections give fans two different ways to use the movie’s characters in LINE conversations: static illustrations in the first set and animated, voice-and-sound stickers in the second.
What Is Chiikawa: The Secret of the Mermaid Island?
For viewers who may be new to the franchise, Chiikawa: The Secret of the Mermaid Island is the first theatrical movie adaptation of Chiikawa.
The film is based on the popular Siren Arc, a longer storyline created by original author and illustrator Nagano specifically for the movie.
The story follows Chiikawa and friends, who receive an invitation to a mysterious “special island.”
The invitation promises an attractive reward for participating in a seemingly easy monster-hunting job. The island also offers limited food and other tempting attractions.
Although the offer sounds suspicious, the characters are drawn to the island and eventually find themselves involved in a much bigger adventure.
The Siren Arc had already become one of the most talked-about Chiikawa stories online before its theatrical adaptation. The movie brings the story to the big screen under Nagano’s full supervision.
Chiikawa Movie Opened in 447 Theaters
The movie opened in Japan on July 24, 2026, in 447 theaters nationwide.
That total consisted of:
- 382 regular theaters
- 65 IMAX theaters
The wide release reflects the enormous popularity of Chiikawa in Japan and gave fans multiple ways to experience the first theatrical adaptation.
The movie has also expanded its theatrical presentation during its run, with 4DX screenings beginning on September 5. The franchise has also held its first cheering screening, giving fans additional ways to enjoy the movie in theaters.
Chiikawa Movie Reaches 10 Million Admissions
The film’s box-office performance has become one of its biggest stories.
After 52 days in theaters, through September 13, the movie had reached:
- 10 million admissions
- ¥14.66 billion in box-office revenue
The milestone was announced by the official movie account, which thanked audiences for continuing to support the film.
The movie had already crossed the ¥10 billion mark around its 30th day in theaters, and its box-office total continued climbing throughout September.
Its cumulative performance shows that Chiikawa has successfully expanded from a popular manga and television anime into a major theatrical franchise.
A New “Secret Book” Visitor Bonus Is Also Coming
The movie’s popularity has also led to another special theatrical bonus.
Beginning September 19, 2026, moviegoers will receive the fifth visitor bonus, titled “Secret Book,” while supplies last.
The booklet contains 52 pages of special material connected to the Siren Arc.
One of the highlights is a newly drawn manga by Nagano titled “Ode and the Island.” The booklet also includes an essay called “Super Delicious Diary,” created specifically for the bonus.
The “Secret Book” is particularly interesting for fans because it includes material related to the development of the Siren Arc.
It also contains the long-awaited story of Shimajiro and Ode getting into a physical fight, which had previously been discussed in connection with the production and development of the film.
Because the bonus is available in limited quantities, distribution is scheduled to end once supplies run out.
What Is the Siren Arc?
The Siren Arc is the central storyline adapted into Chiikawa: The Secret of the Mermaid Island.
Unlike a movie created by simply combining several short television episodes, the film is based on a long-form story written specifically for the theatrical project by Nagano.
This allowed the creators to expand the world of Chiikawa and give the characters a much larger adventure.
The story begins when Chiikawa and friends receive an invitation to a special island.
The offer sounds almost too good to be true, promising easy monster hunting and attractive rewards. Food is another major part of the temptation, with the island offering special meals and sweets.
The characters eventually discover that the island holds much darker secrets than they initially expected.
This mixture of cute characters, comedy, mystery, and unexpectedly serious situations is one of the defining characteristics of Chiikawa.
Nagano Fully Supervised the Movie
Original creator Nagano was closely involved with the theatrical project.
The movie’s story and screenplay are credited to Nagano, with the creator providing full supervision over the adaptation.
This involvement was particularly important because the Siren Arc was created as a major long-form story for the movie.
The result allows the film to retain the distinctive atmosphere of the original Chiikawa manga while expanding the story into a feature-length animated adventure.
What Is Chiikawa?
Chiikawa is a manga and character franchise created by illustrator Nagano.
The manga began appearing on X in 2020, where its short episodes quickly attracted a large following.
The series centers on small, cute characters such as Chiikawa, Hachiware, and Usagi, but the world they inhabit is not always as cheerful as their appearance suggests.
That contrast is one of the main reasons the franchise has become so popular.
The characters may look adorable and harmless, but they regularly face difficult jobs, mysterious creatures, dangerous situations, food-related struggles, and other unexpected problems.
This combination of cute character designs and a surprisingly harsh world has helped Chiikawa appeal to both children and adults.
Why Chiikawa Has Such a Wide Appeal
For newcomers, the easiest way to understand Chiikawa is to think of it as a series that combines simple, cute characters with surprisingly unpredictable stories.
A short episode may begin with something completely ordinary, such as eating food or going to work, before suddenly turning into a strange adventure.
The characters’ limited dialogue and expressive reactions also make the stories easy to understand visually.
At the same time, longtime fans can discover additional details in the characters, setting, and recurring situations.
This balance between simplicity and hidden complexity has allowed the franchise to grow beyond its original manga format.
Chiikawa Has Become a Major Character Franchise
The success of Chiikawa extends far beyond manga and anime.
The franchise has received numerous awards and has become one of Japan’s most recognizable contemporary character brands.
It won the Grand Prix at the Japan Character Awards, while Chiikawa-related products ranked No. 2 in Nikkei Trendy’s 2022 Top 30 Hit Products.
The franchise has also developed a large merchandise business, including plush toys, stationery, clothing, food collaborations, cafes, and other character goods.
The theatrical movie represents another major step in that expansion.
The TV Anime Began in 2022
The Chiikawa television anime began broadcasting in April 2022.
Unlike a conventional long-form anime series, the television episodes are generally short and preserve much of the quick, simple storytelling style associated with the original manga.
The anime has helped introduce Chiikawa and friends to an even wider audience.
According to recent reports, the YouTube catch-up streams for the short anime have accumulated more than 500 million views, demonstrating the franchise’s continuing popularity.
The movie has therefore been built on an already established anime audience while also attracting people who may know the characters primarily through social media or merchandise.
The Movie’s Story Is Designed for Both New and Existing Fans
One advantage of Chiikawa: The Secret of the Mermaid Island is that viewers do not necessarily need to have followed every previous manga or anime episode to understand the main premise.
The central characters are introduced through their adventure on the mysterious island, while the Siren Arc provides a self-contained larger story.
For longtime fans, the movie expands a popular storyline and gives them a chance to see familiar characters in a feature-length production.
For newcomers, it provides an introduction to the personalities and relationships that make Chiikawa popular.
LINE Stickers Bring the Movie Into Everyday Conversations
The new LINE sticker releases are another way the movie continues beyond theaters.
The first set focuses on static images, making it suitable for ordinary messages and reactions.
The second set goes further by adding animation, voices, and sound effects.
This means fans can use some of the movie’s most recognizable moments as dynamic reactions in their LINE conversations.
Because Chiikawa is already strongly associated with short expressions and instantly recognizable reactions, the sticker format is particularly well suited to the franchise.
The release also allows fans who have already seen the movie to continue enjoying its characters after leaving the theater.
Why the Second LINE Sticker Set Matters
The second official LINE sticker collection arrives at an ideal time for the movie.
The film is still playing in theaters, the box office has surpassed ¥14 billion, and the franchise has just crossed the major milestone of 10 million admissions.
The sticker release gives fans another way to participate in the movie’s ongoing popularity.
It also demonstrates how the film has expanded into multiple forms of entertainment: theatrical screenings, special bonuses, 4DX presentations, and digital character goods.
For Chiikawa, the movie is not simply a one-time theatrical event. The Siren Arc has become a major part of the franchise’s current activity.
The second official LINE sticker set for Chiikawa: The Secret of the Mermaid Island is now available, featuring animation, character voices, sound effects, and memorable moments from the movie.
The release follows the first set of static stickers, which became available on September 15. Together, the two collections allow fans to bring the characters and memorable scenes from the Siren Arc into their everyday LINE conversations.
The timing is especially notable because Chiikawa: The Secret of the Mermaid Island is continuing to perform strongly at the Japanese box office. After 52 days in theaters, the film had reached 10 million admissions and ¥14.66 billion in box-office revenue.
The movie’s success has also led to additional theatrical activities, including 4DX screenings and the upcoming fifth visitor bonus, the 52-page “Secret Book.” The booklet includes newly drawn material from Nagano, including the manga “Ode and the Island” and the essay “Super Delicious Diary.”
For newcomers, Chiikawa began as a manga posted by Nagano on X in 2020 and grew into a major character franchise through its manga, television anime, merchandise, and now its first feature film.
The contrast between the characters’ cute appearances and the unexpectedly difficult world they inhabit remains one of the franchise’s biggest attractions.
With the movie still in theaters, new visitor bonuses arriving, and the animated and voice-enabled LINE stickers now available, Chiikawa: The Secret of the Mermaid Island continues to expand its reach beyond the big screen.
