is the debut single by Japanese singer-songwriter Tuki from her debut studio album 15 (2025). It was released independently through her label the Lunar Landing Plan on September 29, 2023. In January 2024, the song topped the Oricon Combined Singles Chart and Billboard Japan Hot 100.
Background and release Tuki began posting her cover and original songs on TikTok while in middle school. "Bansanka" was first uploaded onto TikTok on July 7, 2023. The acoustic version of the song was uploaded to YouTube on September 13, and the duet version with singer-songwriter Yuuri on November 6.
"Bansanka" was inspired after her father mentioned "There are about 30,000 days in a lifetime". Reflecting on that, she thought "I've already lived 5,000 days and only have about 25,000 more".
Live performances Tuki debuted the performance of "Bansanka" on Buzz Rhythm alongside "Inferno Love Letter" on April 20, 2024, and performed on the 75th NHK Kōhaku Uta Gassen on December 31.
Covers Ateez's Wooyoung covered of "Bansanka" on LeeMujin Service on June 23, 2026.
On June 29, 2026, South Korean singer Taeyeon released the Korean version of "Bansanka", as part of the J-Pop Remake project.
On August 29, 2026, South Korean singer Yoon Jeonghan from Seventeen, released a cover of the song .
Accolades + Awards and nominations for "Bansanka" Ceremony Year Award Result Music Awards Japan 2025 Best Japanese Singer-Songwriter Song Karaoke of the Year: J-Pop
Charts
Weekly charts + Weekly chart performance for "Bansanka" Chart (2024–2026) Peakposition Global 200 (Billboard) 153 Japan (Japan Hot 100) 1 Japan Combined Singles (Oricon) 1 South Korea (Circle) 104
Monthly charts + Monthly chart performance for "Bansanka" Chart (2026) Position South Korea (Circle) 115
Year-end charts + 2024 year-end chart performance for "Bansanka" Chart (2024) Position Global Excl. US (Billboard) 184 Japan (Japan Hot 100) 2 Japan Combined Singles (Oricon) 7
+ 2025 year-end chart performance for "Bansanka" Chart (2025) Position Japan (Japan Hot 100) 20
See also List of Hot 100 number-one singles of 2024 (Japan)
References