These are PNG and PDF exports from a live updating OSM database mirrored from osm.org. If you want to see other areas or sizes, just email your request to dane@dbsgeo.com. Ideally provide the name of the area and the bounding box. eg. for sendai: 140.7925 38.1300 141.0926 38.3758 You can use http://eqjp.dbsgeo.com/maps/get_extents.html to get the BBOX (use the lower right "Mapnik Envelope() WGS84")