He debuted in 2002 with the television series You"re Under Arrest, and came to fame with Gokusen 2 in 2005. He has also acted in such shows as Densha Otoko, Tokyo Tower (as Nakagawa Masaya), and Zettai Kareshi (Absolute Boyfriend, as Night Tenjo). Hayami has appeared on television commercials for Daihatsu Tanto, Bourbon Petit, and au by KDDI. He is also the spokesperson for the brand Edwin.
He is known for his cooking skills and has published several cookbooks.