Tadan is of Japanese origin and means "to hit, strike". It's a unisex name, used for both boys and girls. In Japan, it's often written using the kanji characters 打 (da, meaning 'strike') and 男 (dan, meaning 'man'), though other combinations are possible. The name gained international attention through its use by Japanese manga artist Tadanori Yano.
"The name Tadan experienced fluctuations in popularity between 1998 and 2010, with the highest number of births recorded in 2003 at 16, and the lowest in 2009 and 2010 at 5 each. Over these years, there were a total of 114 babies named Tadan."