Show Kasamatsu moved to Tokyo in 2011 to become an actor and has been genuinely engaged in show business career from 2013. In 4 years 2018~2021, he has appeared in 52 dramas. In 2019, he was awarded as the first place among Japanese male actors by the number of movie and drama appearances respectively. I'm He was also ranked No.1 in the Toyo Keizai's ranking of "Unexpected Actors Most Supported by the Production Field Today". He was selected by the director Michael Mann at the audition to play the main character SATO in TOKYO VICE. This drama was co-produced by WOWOW and HBO Max.