
Birthday: January 17, 1972
Since his debut, Hirai has worked as a model, actor, composer, lyricist, singer, and spokesperson. During his career, Hirai has released 45 singles and nine studio albums as of January 2019. According to Oricon, his single Hitomi o Tojite (Close Your Eyes) became the best-selling single of 2004 in Japan, while his compilation album Ken Hirai 10th Anniversary Complete Single Collection '95–'05 "Utabaka" became the best-selling album of 2006 in Japan.

April 26, 2008

January 31, 2015

March 04, 2017

June 10, 2011

June 07, 2019

June 01, 2018

April 28, 2019

May 12, 2021

June 10, 2009

November 23, 2005

Unknown

April 18, 2026

April 03, 2003

September 09, 2019

October 09, 2002

April 09, 2001

April 19, 1995

April 26, 2012

April 19, 2018

October 12, 2009

April 21, 2016

October 11, 2018