The Billboard Japan Hot 100 has a new champion as Sakurazaka46’s “UDAGAWA GENERATION” skyrocketed to No. 1 on the chart dated February 26, 2025, while Sakanaction’s fresh release “Kaiju” made an impressive debut at No. 2. This shake-up on Japan’s premier music chart, released just days before March 6, 2025, highlights the dynamic energy of J-pop and its evolving soundscape, captivating fans both domestically and globally.
Sakurazaka46’s Meteoric Climb
Sakurazaka46, the beloved idol group formerly known as Keyakizaka46, has once again proven their chart dominance with “UDAGAWA GENERATION,” their 11th single. After debuting at No. 28 on the chart dated February 5 and hovering in the top 40 for three weeks, the track surged from No. 33 to claim the top spot. The February 19 CD release was a game-changer, selling an astonishing 533,149 copies in its first week to secure the No. 1 position for physical sales. Digital metrics also shone brightly, with the song re-entering at No. 9 for downloads (3,039 units) and hitting No. 18 for streaming with 4,481,440 streams.
Featuring second-generation member Hikaru Morita as the center, “UDAGAWA GENERATION” blends Sakurazaka46’s signature emotive storytelling with a modern pop edge. Fans on X have hailed it as “a generational anthem,” praising its infectious hooks and the group’s polished performance. This marks their ninth No. 1 on the Japan Hot 100, reinforcing their status as a powerhouse in the idol world.
Sakanaction’s Bold Return
Hot on Sakurazaka46’s heels, Sakanaction stormed the chart with “Kaiju,” debuting at No. 2. Released digitally on February 20, 2025, this single marks the electro-rock band’s first foray into anime soundtracks, serving as the theme for Orb: On the Movements of the Earth, which premiered on NHK in October 2024. Known for their innovative fusion of rock, electronic, and pop, Sakanaction’s latest offering has fans buzzing about its atmospheric vibes and cinematic depth.
While specific sales and streaming figures for “Kaiju” remain undisclosed, its strong No. 2 debut reflects robust digital performance and widespread excitement. The Sapporo-based quintet, led by Ichiro Yamaguchi, last hit No. 1 in 2015 with “Shin Takarajima,” and this near-miss suggests they’re still a formidable contender in Japan’s music scene.
The Bigger Picture
The Japan Hot 100, compiled by Billboard Japan, tracks a blend of physical and digital sales, audio streams, radio airplay, video views, and karaoke data, offering a comprehensive snapshot of musical trends. Sakurazaka46’s triumph bumped Mrs. GREEN APPLE’s “Lilac”—a six-week chart-topper—down to No. 3, signaling a shift in listener focus toward idol-driven pop and fresh releases.
Sakurazaka46’s physical sales dominance contrasts with Sakanaction’s digital-first approach, showcasing the diverse paths to success on the chart. For Sakurazaka46, this victory caps a stellar run, with previous hits like “Shoninyokkyu” and “I want tomorrow to come” also topping the list in 2024. Meanwhile, Sakanaction’s return hints at a potential resurgence, blending their alt-rock roots with mainstream appeal.
What’s Next?
With Sakurazaka46 riding high and Sakanaction back in the spotlight, the Japan Hot 100 is heating up as 2025 unfolds. Will Sakurazaka46 maintain their reign, or can Sakanaction claw their way to No. 1? For now, both acts are shining examples of J-pop’s vibrant diversity, leaving fans eager for the next chart showdown.
