Lee then embarked on the "Welcome to Sparkling Night" tour, his very first sequence of solo live shows. Lee manufactured his solo debut in July 2016, with the studio album Sparkling Night. The proceeds collected from "LEE JONG HYUN Solo Concert in Japan - METROPOLIS" which was held in June 2018 ended up donated for the Great East Japan Earthquake and the Kumamoto Earthquake as a result of the Japanese Red Cross Society.