As an entrepreneur, he co-founded AP Bank, where he personally provided 1 million dollars of seed money to launch and fund the nonprofit lending group which finances environmentally friendly projects.
[4] The topics of his lyrics include: social issues ('So Let's Get Truth'), science/technology ("Everything is made from a dream"), depression ("Surrender"), love ("Shirushi" (しるし)), and war ("1999 Nen, Natsu, Okinawa" (1999年、夏、沖縄)).
The live was part of Yoko Ono's "Dream Power and Educational" platform where artists came together to hold a charity concert to raise money for school construction funds for children in Africa and Asia.
[6] He spent 4 months recovering from the surgery, which required all his music activities, including Mr. Children's "The Wonderful World" tour to be canceled.
Along with music producer Takeshi Kobayashi, and world-renowned composer Ryuichi Sakamoto, the bank invests only in environmentally friendly projects such as renewable energy.
Sakurai along with Yumi Matsutoya, Yohito Teraoka, and Yuzu performed "Dandelion", "Mamotte Agetai", "Destiny", "Natsu Iro" and "Music".
[11] From the songs performed, Sakurai co-wrote the lyrics to "Music" which was later released on July 11, 2007, but did not join in the recording of the single.