I've googled around and haven't found any information. I'm using data from a table in a spreadsheet, accessed from a website (The Statistics Bureau of Japan) and I don't know how I should cite it using Harvard style. At the moment, I've come up with this mess:
Statistics Bureau of Japan, Ministry of Internal Affairs and Communications (2015) Population by Age (5-Year Group and 3 Groups) and Sex (as of October 1 of Each Year) -Total population (from 1920 to 2000) [Microsoft Excel spreadsheet]. Tokyo: Statistics Bureau of Japan, Ministry of Internal Affairs and Communications. Available from: http://www.e-stat.go.jp/SG1/estat/ListE.do?bid=000000090004&cycode=0 [accessed 27 November 2015]
Or to break this down:
Organisation name (year of publication) Title of spreadsheet [Microsoft Excel spreadsheet]. Place of publication: publisher. Available from: URL [date accessed]
But then, I'm not sure how to cite it in-line. How should I reference it? By the lengthy spreadsheet title? By the equally lengthy "Statistics Bureau of Japan, Ministry of Internal Affairs and Communications"?