RIAJ有料音楽配信チャート
On April 4, 2011, Mr. Children released the download single "Kazoe Uta" to collect donations for the 2011 Tōhoku earthquake. "Kazoe Uta" debuted at number 1 on the RIAJ Digital Track Chart, surpassing the download sales of AKB48's charity single "Dareka no Tame ni (What Can I Do for Someone?)".