On April 21, 2021, the song "ありがとうの空 - オリジナル・カラオケ" was released by 北山たけし, 原田悠里, 山口ひろみ, 大江 裕. With this song being about 5 minutes long, at This song is fairly a long song compared to the average song length. This song does not have an "Explicit" tag, making it safe for all ages.