This 1997 single showcases Hirai's early R&B and soul influences, prefiguring his later mainstream success.
- "Heat Up" was released on July 21, 1997, by Sony Music Labels Inc.
- The single's genre is listed as R&B, pop, and soul.
- This release predates Hirai's first full-length album, "The Clair", by several months.
Ken Hirai is a Japanese pop, R&B, and soul singer. He rose to fame in the late 1990s and became one of Japan's best-selling artists. The single "Heat Up" was released early in his career, following his debut.
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