© 2015

Eutrophication and Oligotrophication in Japanese Estuaries

The present status and future tasks

  • Tetsuo Yanagi

Part of the Estuaries of the World book series (EOTW)

Table of contents

  1. Front Matter
    Pages i-xi
  2. Keita Furukawa
    Pages 5-37
  3. Tetsuo Yanagi
    Pages 39-67
  4. Machiko Yamada
    Pages 69-97

About this book


This book presents lessons learnt from Japan’s past, in relation to coastal waters, industrial pollutants and concentrated urban populations. It examines ecosystem damage and pollution in coastal sea areas and addresses the question: What is the present status of Japanese estuaries from the view point of eutrophication and oligotrophication? The authors describe three typical situations, namely eutrophication problems in Tokyo Bay, oligotrophication problems in the Seto Inland Sea, and the disappearance of hypoxia in Dokai Bay. Readers will learn how legal controls on Total Phosphorus (TP) and Total Nitrogen (TN) loads have played an important role in each of these three bays. They will see that the results of the application of the law differ among the three bays as the characteristics of material cycling are different. The roles of community activities, water related technology development and local characteristics emerge, as responses to problems of environmental deterioration and future tasks are all investigated in this publication. 

The book will appeal to anyone with an interest in maintaining healthy estuaries, or in coastal water environment affairs and governing systems.


Estuaries Eutrophication Hypoxia Oligotrophication Seto Tokyo Bay Total Loads Control Law Total Nitrogen (TN) loads Total Phosphorus (TP) loads

Editors and affiliations

  • Tetsuo Yanagi
    • 1
  1. 1.International EMECS CenterKobeJapan

About the editors

Dr. Tetsuo Yanagi is a coastal oceanographer. Tetsuo has about 500 scientific publications. He was awarded a Japan-France Oceanographic Society Award in 1986 and the Uda-Prize of Oceanographic Society of Japan in 2012. Tetsuo was a member of the Scientific Steering Committee of Land-Ocean Interactions in the Coastal Zone (LOICZ) and is a member of the Scientific Planning Committee of Japan’s Environmental Management of Enclosed Coastal Seas (EMECS). He discovered the tide-induced residual current and proposed a new concept of Satoumi for integrated coastal sea management.

Bibliographic information