Japanese singer Leon Niihama, known for his enka and kayokyoku music, has just released a fun and upbeat music video for his latest song, "Fun! Fun! Fun!" This catchy pop tune is extra special because it’s the brand new ending theme song for the popular anime series Detective Conan, also known as Case Closed in English. Fans of both Niihama and Detective Conan are thrilled about this collaboration, which marks Niihama’s first time contributing a theme song to the main Detective Conan anime series.
While this is his debut on the main series, Niihama is no stranger to the Detective Conan universe. Back in 2022, he lent his voice to "Tsukamaete, Konya," the opening theme song for the spin-off anime Case Closed: The Culprit Hanzawa. Now, he’s taking center stage with "Fun! Fun! Fun!" for the main series, showcasing his versatility and appeal to a wider audience. Niihama, who started his career as an enka singer in May 2019 and has released six singles to date, is clearly expanding his musical horizons and reaching new heights in his career.
The song "Fun! Fun! Fun!" officially became the 73rd ending theme for Detective Conan on April 12th, when it premiered with the anime’s 1158th episode in Japan. The music video for the song is now available on Leon Niihama’s official YouTube channel, allowing fans worldwide to enjoy the energetic visuals and infectious melody. For those eager to own a physical copy, the double A-side CD single, featuring "Fun! Fun! Fun!" and another song titled "Honoo no KISS," is set to be released in Japan tomorrow, April 16th. However, for those who prefer digital music, "Fun! Fun! Fun!" is already available for download and streaming on various digital platforms, making it easily accessible to listeners everywhere.
Leon Niihama himself has expressed his excitement and honor in being chosen to perform the ending theme for such a globally beloved anime. He stated, "I am very honored to be in charge of the ending theme for Detective Conan, an anime that is very popular worldwide beyond Japan." He further shared that he has been working closely with the Detective Conan team since last summer to create this song, emphasizing his respect for the long-running anime and his joy in contributing to its legacy. Niihama hopes that "Fun! Fun! Fun!" will bring joy and cheerfulness to listeners, envisioning people dancing to it at events. He believes the song has the power to make the world a little brighter and more fun, perfectly capturing the lighthearted and adventurous spirit of Detective Conan.
Adding to the excitement surrounding the release, the CD single "Fun! Fun! Fun! / Honoo no KISS" will be available in five unique editions, each with its own distinct CD jacket design. These editions are named Kokoro Odoleon edition, Kirakira Hikaleon edition, Moeagaleon edition, Iroke Dadamoleon edition, and a special Detective Conan edition. The Detective Conan edition is particularly appealing to fans of the anime, as it comes with a bonus acrylic stand featuring characters from the series. This variety of editions caters to different tastes and preferences, encouraging fans to collect their favorite versions.
In a fun and collaborative move, Leon Niihama has also teamed up with fellow musician Kocchi no Kento, who is performing the opening theme song for the spring 2025 TV anime My Hero Academia: Vigilantes. Both artists have released collaboration videos on their respective YouTube channels where they sing each other’s songs. This cross-promotion highlights the interconnectedness of the anime music scene and provides fans with a unique opportunity to enjoy both "Fun! Fun! Fun!" and Kocchi no Kento’s song, "Kekka Orai." The collaboration videos, titled "Kocchi no Kento x Leon Niihama ‘Fun! Fun! Fun!’ Collab Video" and "Leon Niihama x Kochi no Kento ‘Kekka Orai’ Collab Video," are gaining popularity and further amplifying the buzz around both artists’ new releases.
Detective Conan itself is a cultural phenomenon with a rich history. The TV anime adaptation of Gosho Aoyama’s original manga series first premiered in Japan way back in January 1996, marking nearly three decades of captivating audiences with its intricate mysteries and beloved characters. The first theatrical anime film followed in April 1997, further solidifying the franchise’s popularity. Today, Detective Conan continues to be a global sensation, enjoyed by fans of all ages around the world. For international viewers, Crunchyroll streams the TV anime series, making it accessible to a wide audience. The series follows Shinichi Kudo, a brilliant high school detective who, after being shrunk into a child’s body, takes on the alias Conan Edogawa and continues to solve challenging cases.
The release of "Fun! Fun! Fun!" as the new ending theme song is perfectly timed to coincide with the ongoing Detective Conan TV Anime 30th Anniversary Project, celebrating this milestone in the anime’s history. This anniversary project is likely to include various events, merchandise, and special releases throughout the year, making it an exciting time to be a Detective Conan fan. Leon Niihama’s involvement as a theme song artist adds another layer of celebration to this anniversary year, bringing fresh energy and musicality to the long-running series.
With its catchy melody, vibrant music video, and connection to the iconic Detective Conan anime, "Fun! Fun! Fun!" is poised to become a fan favorite. Leon Niihama’s energetic performance and positive message in the song resonate perfectly with the spirit of the anime, promising to brighten up the ending credits of each episode and leave viewers feeling cheerful and entertained. Anime enthusiasts and music lovers alike are encouraged to check out the "Fun! Fun! Fun!" music video on YouTube and explore the various editions of the CD single, immersing themselves in the fun and exciting world of Leon Niihama and Detective Conan.