Heavy metal music
Critics disagree over who can be thought of as the first heavy metal band. Most credit either Led Zeppelin or Black Sabbath, with American commentators tending to favour Led Zeppelin and British commentators tending to favour Black Sabbath, though many give equal credit to both. A few commentators—mainly American—argue for other groups including Iron Butterfly, Steppenwolf or Blue Cheer. Deep Purple, the third band in what is sometimes considered the "unholy trinity" of heavy metal (Black Sabbath, Led Zeppelin, and Deep Purple), despite being slightly older than Black Sabbath and Led Zeppelin, fluctuated between many rock styles until late 1969 when they took a heavy metal direction.
Sinawe
Sinawe () is a heavy metal/rock band from South Korea. Led by guitarist and sole constant member Shin Daechul, they are credited as being the first heavy metal band in South Korea. During its golden age in the late 1980s and mid 1990s, many now renowned musicians such as Yim Jae-beom, Kim Jong-seo, Seo Taiji and Bada Kim improved their musical abilities while members of Sinawe.