Microsoft Office for Mac 2011 Service Pack 1 (14.1.0) https://www.microsoft.com/en-us/download/details.aspx?id=17198
Microsoft Office for Mac 2011 14.6.3 Update https://www.microsoft.com/en-us/download/details.aspx?id=51771
Turn on Japanese language features (U.S. version only) http://mac2.microsoft.com/help/office/14/en-us/excel/item/7a715c3c-70ca-4508-9cbd-2f8b0f9bd563