Animelo Summer Live 2025: Historic Opening with FLOW and Hironobu Kageyama's 'CHA-LA HEAD-CHA-LA'!

DAY2 of Animelo Summer Live 2025 "ThanXX!" (Anisama 2025) kicked off on August 30, 2025, with a legendary surprise collaboration. Popular rock band FLOW and the "legend" of the anison (anime song) world, Hironobu Kageyama, performed together, delivering "CHA-LA HEAD-CHA-LA," the iconic theme song from the national anime "Dragon Ball Z." The venue erupted into a frenzy, and the performance instantly dominated social media trends.

At the opening of the event, just as attendees anticipated FLOW's "DAYS" (the opening theme for Eureka Seven), the intro to "CHA-LA HEAD-CHA-LA" blared through the speakers. Hironobu Kageyama then appeared as a secret guest, drawing thunderous cheers from the crowd. This dream collaboration was met with enthusiastic comments such as "Explosive start!", "Tears flowing!", and "Blew up the venue and social media, transcending generations and eras!" The performance generated such a massive response that it quickly climbed to the top of Yahoo!'s trending topics.

Following "CHA-LA HEAD-CHA-LA," FLOW continued to captivate anison fans with a series of their representative hits, including "DAYS," "GO!!!" (the opening theme for Naruto), and "7 -seven-." Their powerful stage presence, described by fans as "too strong from the very beginning" and "already won," created a peak of excitement from the early stages of Anisama DAY2.

"CHA-LA HEAD-CHA-LA" has been a beloved anison across generations for many years, and this collaboration once again demonstrated the song's universal appeal and the strong bonds within the anison community. Its popularity extends to various forms, from being sung at karaoke and covered by VTubers to being used as a cheering song in corporate baseball tournaments. This truly "legendary collaboration" between FLOW, who are leading the "now" of the anison world, and Hironobu Kageyama, who built its "legend," vividly colored a new chapter in Anisama's history.

The context

To help non-Japanese readers understand this article, here's some background information:

• Animelo Summer Live (Anisama): This is the largest annual anime song festival in Japan, and arguably the world, featuring a vast array of popular anime song artists and voice actors. It's a highly anticipated event for anime and music fans.
• FLOW: A popular Japanese rock band known for contributing numerous theme songs to hit anime series, including "Naruto," "Eureka Seven," and "Code Geass." Their energetic performances are a staple of the anison scene.
• Hironobu Kageyama: Often referred to as the "Prince of Anison" or an "Anison Legend," Kageyama is one of the most iconic figures in Japanese anime music. He is best known globally for his powerful vocals on theme songs for the "Dragon Ball Z" series, including "CHA-LA HEAD-CHA-LA." He is also a prominent member of the supergroup JAM Project, which is dedicated to anime and video game music.
• "CHA-LA HEAD-CHA-LA": This is the first opening theme song for the globally popular anime series "Dragon Ball Z." It's instantly recognizable worldwide and is considered one of the most iconic anime songs of all time, beloved by multiple generations. Its enduring popularity is evident in its continued use in various contexts, as mentioned in the article.
• "Dragon Ball Z": A massively influential and globally beloved Japanese anime television series produced by Toei Animation. It's a sequel to the "Dragon Ball" anime and adapts the latter portion of the original "Dragon Ball" manga series created by Akira Toriyama.