My currently-local paper ran an article on Japanese gardens. Other than the fact that it does not mention Vancouver's Nitobe garden at all, it does have an explanation of what makes a Japanese garden with links to more information. I've found two links to the same article that originally ran in the Chicago Tribune: http://www.ctnow.com/topic/sc-home-1124-japanese-gardens-20141117,0,4989906.story (note that there are two pages) http://cortlandstandard.net/images/Real Estate/0108/REA_01082015_003.pdf
Yes, it's an apparently syndicated piece about Japanese gardens rather than a travelogue or survey, hence no mention of the Vancouver location.