ok, I went around the North 2 East 9 block (15 seems to concern the whole block -- old numbering system it seems, very rare in Sapporo). I found a park, a few older houses, and a newish company.
Actually, this address is across the street from my favorite Mac computer shop in town.
There is a very old dry-cleaners and buddhist temple (errr, OTERA) that faces most of the 15 banchi area that probably has been there for a while.
Since, she was an older member of the community I felt a little strange to knock on doors. Also, because I didn't really know what kind of circumstances I should be asking for and would hate to accidently dig up old bones.