[masraum]

I found this just now, not any info about price or acquisition.

http://www.ukiyoe-gallery.com/gallery3.htm

the summer panel -- http://www.ukiyoe-gallery.com/detail-c674.htm

the autumn panel -- http://www.ukiyoe-gallery.com/detail-c675.htm

Looks like it'd be a pretty set. I lived in Japan a couple of times when I was younger back before the collector market hit big. I wish I had purchased some Ukiyo-e. I love it.

This place has some of the artist's other stuff for sale.

http://www.robynbuntin.com/ukiyo-e/MorebyArtist.asp?ArtistID=523

Go here if you're looking for prices that are probably representative.
http://shop.ebay.com/?_from=R40&_trksid=m38.l1313&_nkw=kotozuka&_sacat=See-All-Categories