Flavon's Wild Herb and Alpine Plants: A bilingual guide to photographs of Japanese wild flowers and plants in the Japanese Alps.
Grognards Japan: A nation wide games club for wargames, roleplaying games, chess, shogi, igo, strategy and board games.
Japan Dance Sport Federation: Information on amateur and pro ballroom dancing in Japan, studios, and competitions.
Japan English-Language Golf Course Guide: This site describes the world's only English-language comprehensive guide to Japanese golf courses where non-Japanese players are always welcome.
Japan Gymnastic Association: Information on gymnastics of all kinds in Japan, including results, news, and events.
Japan Science Fiction Conventions Listing: Links to upcoming conventions, with both English and Japanese pages.
Japanese Alpine Club: With history and membership information.
Japanese Gymnasts: Listings and accomplishments of famous Japanese gymnasts.
Kumagaya Sanryou-Kai Mountaineer's Club: About the club. Membership information. Trip reports and photos.
My Mountain Photo Diary: Shows 3D versions of over 100 popular mountains for climbing.
Outdoor Japan: Outdoor activities, travel destinations, sporting activities, hot springs, nature, events, and features.
Sail Japan: An English guide to sailing in Japan, promoting sailing to the foreign community. With directories, forums, news and useful information.
Ski Japan Guide: A comprehensive guide to skiing and snowboarding at over 700 resorts. Updates daily; with articles and forums.
Sports Info Japan: Features sports updates from ongoing tournaments and news in Japan.
The Japan Biker F.A.Q. -- Motorcycles, Touring, Racing and Riding in Japan.: Complete FAQ on motorcycle riding, traffic issues, legalities, and other important concerns in Japan.
The Japan Philatelic Society: The only national organization for stamp collectors in Japan.
Women's International Motorcycle Association, Japan: Japan chapter of international club, with outline, messages, and benefits.
Zen Nippon Airinkai: The world wide Koi Carp Keepers Society of Japan.