included in ListSet response.
http://www.wis-jma.go.jp/meta/oaiprovider.jsp?verb=ListSets
Until last week there was an problem that the size of WIS-GISC-TOKYO is not
displayed correctly. It is now fixed and it returns reliable number.
The documentation at http://www.wis-jma.go.jp/cms/metadata/oai-pmh/ uses the
ListSets internally, and hence fixed accordingly.