648-0121 is a postalcode and its consensus geometry is derived from gn.
{"gn:adm1_code":"","gn:adm2_name":"Itogunkudoyamachou","mz:is_ceased":0,"geom:latitude":34.2758,"gn:name":"Nyuukawa","wof:name":"648-0121","counts:names_total":0,"wof:placetype":"postalcode","mz:is_approximate":1,"wof:hierarchy":[{"continent_id":"102191569","country_id":"85632429","postalcode_id":538300183,"region_id":85672795}],"mz:is_deprecated":0,"geom:area":0,"geom:longitude":135.6061,"wof:id":538300183,"counts:concordances_total":1,"geom:type":"Point","wof:lastmodified":1474577450,"wof:belongsto":["102191569","85632429",85672795],"gn:accuracy":"","gn:adm1_name":"Wakayamaken","wof:concordances":{"gp:id":"26292589"},"wof:repo":"whosonfirst-data-postalcode-jp","gn:adm3_name":"","src:geom":"gn","wof:country":"JP","counts:names_preferred":0,"gn:adm3_code":"","gp:parent_id":"28468634","wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"JP","counts:names_languages":0,"geom:bbox":"135.6061,34.2758,135.6061,34.2758","gn:adm2_code":"","wof:superseded_by":[],"wof:supersedes":[],"wof:geomhash":"fec9d1926a8821eb16ab7a3c041f3ce8","wof:parent_id":85672795,"wof:placetype_names":["postalcode"],"mz:hierarchy_label":1,"wof:placetype_id":470996387,"edtf:cessation":"uuuu"}