Japan's Most Powerful Follow the Sensei of Seaweed.

The article discusses the business management tenets of Ina Food chief executive Hiroshi Tsukakoshi and states that executives from several Japanese firms such as Toyota Motor Corp. and the Bank of Japan seek Tsukakoshi's counsel. It discusses Tsukakoshi's book "Tree-Ring Management," the principles involved in Ina Food's production of agar from seaweed, and Japanese business values. The article presents comments from Toyota chief executive Akio Toyoda.