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Tatsuya "Tats" Nakagawa is an accomplished entrepreneur, author, and expert on innovation & marketing.

  Tatsuya Nakagawa is the co-founder of Castagra Products and the host of the Specified Growth Podcast. Castagra helps contractors and commercial property owners solve difficult roof coating (tar and gravel) challenges.  One of it's products, Ecodur, is approved and used by the top companies in the world. Ecodur has also been voted top "Greenvention" by the entrepreneur reality show Dragon's Den. 


 Over the past 20 years, Tats has launched hundreds of products and services, co-authored Overcoming Inventoritis: The Silent Killer of Innovation (Forward by Steve Wozniak, co-founder of Apple), spoken to a variety of industry groups including: Chartered Accounts of Canada, Canadian Bar Association, The American Chamber of Commerce and The International Internet Marketing Association, written articles for Fast Company, Construction Today and Industry Week and been quoted on CBS News, Global TV, CBC and in The Globe and Mail and BC Business.  


Castagra's Ecodur Roof Coating

  Castagra's Ecodur is one of, if not the leading green roof coatings company in the world, with its management having pioneered a VOC-free veggie-plastic protective coating formulation some 25 years ago, long before the mainstream clamor for coatings that do none harm to people and the environment