Shinhwa's Minwoo made a surprise appearance on this week's special 'M! Countdown One Asia Tour: Hello Japan'.

Minwoo stepped on stage during Supernova's performance on 'M! Countdown' which took place at the Saitama Super Arena Hall in Japan. Supernova performed Shinhwa's 5th album title track "Perfect Man", and Minwoo came on stage for his part of the song. Korean fans were touched to see that so many fans in Japan gave such a warm response to the collaboration performance.

Meanwhile, this 'M! Countdown One Asia Tour: Hello Japan' marked the midway point before the 2012 MAMAs. Also, Shinhwa will be embarking on their Asia tour April 30th starting with a performance in Shanghai.

Check out the performance below, if you didn't catch it last night! (Minwoo makes his appearance around the 1:16mark)



Source: OSEN