Metadata Source: https://www.youtube.com/watch?v=HOz-9FzIDf0
https://www.nicovideo.jp/watch/sm11809611
https://web.archive.org/web/20101111120249/http://yakari.blog17.fc2.com/blog-entry-353.html
Song was featured in many rhythm games but that was after release so using the source field is optional.