D=OUT (pronounced DOUBT) is a Japanese rock band formed in 2006.
Beginning with secret activities at Meguro’s Rockmaykan, their official debut was in March 2007.
Based in Tokyo and playing all over the country, in 2009 D=OUT embarked on their first European tour.
They were able to have their major debut in 2011 with their single ROMAN REVOLUTION.
The following year, they announced their first major album MUSIC NIPPON.
Building up energetic show after energetic show, D=OUT continues to increase in popularity. They experience changes in their member lineup, and since August 2015, they have been playing with the following members: Kouki (vocal), Ibuki (guitar), Hikaru (guitar), Reika (bass), and Naoto (drums).
Kouki, frontman and vocalist of the visual kei band D=OUT which made a name for itself as an outlier in the genre by being the first visual kei band to play number one on the Oricon music chart with their single “Chuukyori Renai”, made his solo debut as a singer of Japanese ballads in 2015.
His solo artist name, Kouki Hanamizakura, was given to him by close, personal friend Shou Kiryuin from the band Golden Bomber.
On February 18th, 2015 his debut single “I love Tokyo” was released and placed number 3 on the weekly Oricon singles chart for ballads and ranked 29 overall for the Oricon chart.
On August 5th, 2015, he released his first album “Hanami Dayori -Ore no Onna Uta Meikyoku Shu-.
On September 5th, 2018, after a three year lapse, he released his second single “Wasuregasa” which placed number 2 on the Oricon Singles weekly chart for ballads.