Since hitting Japanese theaters on July 24, the franchise's first animated feature, Chiikawa the Movie: The Secret of the Mermaid Island, has been a box-office sensation. Backed by a steady stream of audience giveaways, it has become Japan's highest-grossing film of the year.
Officials had previously announced plans to bring back several earlier admission bonuses. On November 9, they went one step further and revealed the eighth through twelfth bonus waves all at once. The rapid-fire announcement was surprising enough, but the actual items caught fans completely off guard. The biggest standout is Wave 12's mini flashlight shaped like an AA battery, which quickly sparked plenty of online buzz.
Wave 8 begins distribution on November 14 and features the "Inflatable Binyoyo." It turns the island weapon expertly wielded by the residents, Usagi and Momonga into a balloon, complete with character artwork printed inside.
Hold it in your hands and you can almost imagine fighting alongside Chiikawa and the gang against the Siren. It is a wonderfully playful theater bonus.
Officials also confirmed that the widely discussed bonuses from Waves 3, 4 and 6 will return.
- Wave 9, from November 28: A reissue of Wave 4's four charm mini figures, featuring Shimajirō, Siren, Hitoha and Futaba. Designs will be distributed at random.
- Wave 10, from December 5: A reissue of Wave 3's "Happy Siren♪" pull-back cars, featuring Chiikawa, Hachiware and Usagi. Designs will be distributed at random.
- Wave 11, from December 12: A reissue of Wave 6's two charm mini figures, featuring Chiikawa with Hachiware and Usagi with Momonga. Designs will be distributed at random.
Wave 12, meanwhile, is officially the "No Keeping Secrets! Flashlight," with distribution beginning December 19.
This mini flashlight is modeled after the AA battery, a key item from the story. Switch it on and it projects a hidden image, packing a clever piece of the movie's world into one tiny collectible. What image does it project? That remains a secret for now. 
By the time the final bonus arrives, Chiikawa the Movie: The Secret of the Mermaid Island will have been in theaters for nearly five months and still handing out admission goodies. At this rate, the ¥20 billion milestone looks comfortably within reach.
via： X@映画ちいかわ 人魚の島のひみつ』公式