I contributed an article called "Free 2.0" to the first issue of the renewed Hakuhodo magazine "Advertising". The book itself is being sold for 1 yen and is an experimental book. It is a very thick book with over 600 pages. The contents of this article are available in full.
The full article is here
https://note.com/bizgram/n/n07aeb84117b4
Learn more about magazine advertising here
https://kohkoku.jp/
Amazon is here
https://www.amazon.co.jp/dp/B07VCQB8LT
Tetsuro Kondo, Makoto Okiyama