Here’s beginning of an Asahi article about this video:
— start quote — Kumamoto Castle video goes viral with 400,000 views February 01, 2016 By CHIE KOHARA/ STAFF WRITER KUMAMOTO–A YouTube video to promote Kumamoto Castle starring popular dance duo Egu-Splosion has become an online hit, garnering more than 400,000 views since its release in late December. — end quote — http://ajw.asahi.com/article/cool_japan/style/AJ201602010001
It would be nice if the video had English subtitle. As the article indicate, the song is filled with lots of interesting trivia about the castle.
