Go's contributions to furthering Japanese tenkara knowledge in the West have been invaluable, and this in-depth "sit down" really adds great context to the man behind the translations. There's also a nice accompanying blog post over on the Discover Tenkara website.
In a somewhat related side-note, I have to further compliment and recommend Discover Tenkara's new print book, "How To Fool Fish With Simple Flies." I received my copy in the mail over the holidays and have had the opportunity to read it almost from cover to cover.
Not only is there some great photography of over 70 different examples of simple flies / kebari, but the book really shines with its extremely detailed instruction on how to effectively fish them. While a lot of folks consider tenkara "basic," this book can definitely take your fly presentation and manipulation to the "next level."