What is kouhaku uta gassen?

Some articles on uta, kouhaku uta gassen:

Max (UTA)
... operated by Utah Transit Authority (UTA) along the Wasatch Front in Utah, United States ... It is described by UTA as "light rail on rubber tires" ...
List Of Ayumi Hamasaki Concerts
... Boys Girls - 50th Kouhaku Uta Gassen 31.12.1999 / SEASONS - 51st Kouhaku Uta Gassen - 31.12.2000 / Dearest - 52nd Kouhaku Uta Gassen 31.12.2001 / Voyage - 53rd Kouhaku Uta Gassen 31.12.2002 / No. 58th Kouhaku Uta Gassen 31.12.2007 / Mirrorcle World - 59th Kouhaku Uta Gassen 31.12.2008 / Rule - 60th Kouhaku Uta Gassen 31.12.2009 / Virgin Road ...