Toru Kitajima (Japanese: 北嶋 徹, Hepburn: Kitajima Tōru, born December 23, 1982 in Tokyo), better known as TK, is a Japanese musician and singer-songwriter. He rose to prominence as lead vocalist, guitarist and songwriter of the rock band Ling Tosite Sigure, which formed in 2002. In 2011, he started to release solo material as TK from Ling Tosite Sigure (TK from 凛として時雨).

Source: Wikipedia (https://en.wikipedia.org/wiki/Toru_Kitajima)