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Sailing Japan:
Secrets of Japanese Waters

The complete cruising guide to Japan — from the Ryukyu Islands to Hokkaido. Second Edition, March 17, 2026.

By Paul Tsai
Second Edition · March 17, 2026
English 中文版 한국어 Français

About This Guide

Japan is one of the world's great undiscovered cruising destinations — an archipelago of nearly 7,000 islands stretching 3,000 kilometres from subtropical Okinawa to the wilderness of Hokkaido. Yet remarkably few foreign yachts venture into Japanese waters, and until now there has been no comprehensive English-language guide for those who do.

Sailing Japan: Secrets of Japanese Waters fills that gap. Drawing on years of personal experience sailing in Japan and fluency in Japanese, this guide covers everything a cruising sailor needs to navigate the country's waters with confidence: clearance formalities and the Naikosen permit system, region-by-region harbour and anchorage information, navigation in the powerful tidal straits of the Seto Inland Sea, typhoon strategy, provisioning, cultural etiquette, and the unique Umi-no-Eki sea station network that most foreign sailors have never heard of.

What's Inside

The guide is organized into eight regional chapters covering Okinawa and the Ryukyu Islands, Kyushu, Shikoku, South Honshu, North Honshu, and Hokkaido — plus six practical appendices including a Japanese language guide for sailors, emergency contacts, a marina directory, recommended typhoon anchorages, cruising budget breakdowns, and a complete Umi-no-Eki directory.

Each regional chapter includes port-by-port coverage with moorage options, shore-side facilities, local highlights, passage planning notes, and food and cultural recommendations. Whether you're planning a two-week cruise of the Seto Inland Sea or a full circumnavigation of the archipelago, this guide gives you the practical information to make it happen.

8 Regional Chapters
Okinawa · Kyushu · Shikoku · South Honshu · North Honshu · Hokkaido — with passage planning, food, and culture for each region.
6 Practical Appendices
Japanese for sailors · Emergency contacts · Budget planning · Typhoon anchorages · Marina directory · Umi-no-Eki directory.
Formalities & Permits
Step-by-step clearance procedures, ports of entry, the Naikosen coastal permit, and the Closed Port permit explained.
Navigation & Tides
Charting options, tidal current strategy for the Seto Inland Sea straits, the Kuroshio Current, and fishing net hazards.
English 中文版 한국어 Français

I welcome feedback and corrections — they'll be incorporated into future editions. If you've sailed in Japan, I'd also love to include your photos in upcoming versions. Please reach out through the contact page.

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