In 2011 a magazine revealed that the actor Nadech “Barry” Kugimiya was of Thai-Austrian descent and not Thai-Japanese. The actor came forward to say he didn’t mean to deceive anyone and declared himself unworried by the resulting fuss. Reportedly far from deceiving fans for his own sake, he really did it for his adoptive parents: “My foster father is Japanese. I told everyone I am half Thai, half Japanese to honour him.” He denied he felt stressed to be exposed as Thai-Austrian. “I meant to tell people, but the time had not yet arrived,” he said.

In his personal life he can speak fluently in Isan dialect and Central dialect Thai languages. However, he cannot speak Japanese language because Yoshio, his adoptive father, did not teach him, instead only speaking Thai to him.

At the age of 17, Nadech became a model doing photo shoots and commercials like Trident chewing gum , Shokubutsu shower cream for Men, Samsung Monte 3G, Nevia For Men, Yamaha Fino, Baoji shoes , Lays, Mazda, Minute Maid Pulpy and more .

In 2010, he made his feature drama debut in a leading role in Ngaorak Luangjai as Nawa Gamtornpuwanat. Nadech Kugimiya gained immense popularity after his work in the series called drama 4 Hua Jai Haeng Khun Khao (Duang Jai Akkanee or Akkanee’s Heart ) as Fai Akkanee Adisuan played with Urassaya Sperbund and (Gamerai Gamerak or Love Game Evil Game) as “Saichon / Charles Makovich” played with Urassaya Sperbund. His manager is Suphachai Sriwichit.