2018年世界で最も急成長した音楽のジャンル：1位ヘヴィメタル　2位Jポップ　【海外の反応】
http://babymetalize.com/archives/10082


https://www.kerrang.com/the-news/heavy-metal-is-the-fastest-growing-music-genre/
Their 2018 figures are as follows:

Heavy metal ? 154% increase
J-Pop ? 133% increase
R&B/Soul ? 68% increase
K-Pop ? 58% increase
World music ? 57% increase
Instrumental ? 42% increase