Arashi and Yonezu Kenshi's collaboration song "Kaito" will be used as the 'NHK 2020 Song' to support the young generation in 2020, the year the 2020 Olympics Paralympics will be held in Tokyo. 

"Kaito" was written and composed by Yonezu and sung by Arashi. The group will perform this song for the first time at the '70th NHK Kohaku Uta Gassen' on December 31. In addition to sports programs shown on NHK, "Kaito" will be used for various programs and services. 

On the collaboration, Aiba Masaki commented, "It is filled with a kindness that will save people who are working hard. I was moved by singing it." Meanwhile, Yonezu said, "I wrote this song wishing that it will be long-lasting. I hope it will be heard widely." 

Source: natalie