[4][5][6][7] Hayami debuted in 2002 with the television series You're Under Arrest, and came to fame with Gokusen 2 in 2005.

[8] Hayami has appeared in popular TV dramas like Densha Otoko, Tokyo Tower, Zettai Kareshi (Absolute Boyfriend, as Night Tenjo), Shinzanmono, Kinkyū Torishirabeshitsu and 5-ji Kara 9-ji Made.

He also featured in numerous TV commercials such as Daihatsu Tanto, Bourbon Petit, au by KDDI,[9] Suntory, Nissin Foods, P&G, Kirin and Oji Nepia.

[14] In July 2019, Hayami started an official YouTube channel called M's Table where he posts his original food recipes.

[15] On August 8, 2019, Hayami and actress Aya Hirayama were married in an intimate ceremony attended only by family and close friends.