He joined long running theatrical troupe Jidougekidan at the age of 2 in 1995, and debuted in a commercial in the same year. He then made his acting debut in 1999 in Masahiro Nakai's drama Good News.
He was then known as a "genius child talent", and at 12, starred as the lead in the remake of Youkai Daisensou in 2005 where he won the "Best Newcomer" award in the 29th Japanese Academy Awards.
He starred in his first drama in 2006's Tantei Gakuen Q (NTV) and has constantly been appearing in dramas and movies ever since. One of the biggest reasons why he's survived for such a long time in the industry is his choice of talent agency.
"He's in this major production firm which manages the Southern All Stars, Masaharu Fukuyama, Takeru Sato, Haruma Miura, and Yuriko Yoshitaka, among others. He receives a wide variety of projects, and he'll be secure even when he gets involved in a scandal with a woman as the agency will clean up after the mess. If he were in a different agency, he would have lost offers and would gradually fade out from the industry." - (TV rep)
Kamiki starred in the silver screen adaptation of the best-selling novel Kirishima, bukatsu yamerutteyo in 2012 which sparked his second break. He then went on to make an impressive performance in last year's drama Kazoku Game, which left a stronger impact than the main star Sho Sakurai of Arashi.
He has been cast as the lead in the upcoming suspense thriller drama Henshin on WOWOW which is based on Keigo Higashino's novel, and will be in a number of upcoming movies, namely Rurouni Kenshin -Kyoto Taika-hen/ Densetsu no saigo-hen, Kamisama no iutoori, and next year's Bakuman. It seems that he has thorough knowledge of how to survive in the industry.
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