Apparently we DO have a Seiko Matsuda thread! I'll post what I posted in the other thread here:
Latest Single:
花びら舞う季節に [Hanabira mau kisetsu ni]
Released on March 19, 2008
Peak Position: #32
Copies sold: 3,676
Upcoming work:
New album entitled "my pure melody" to be released May 21, 2008!
Source:
Here