The Japan National Tourist Organization has a broad range of essays on Japanese culture. This is the complete list.

Japan Fact Sheets The Japanese National Government provides informative fact sheets about many aspects of Japanese culture, economics and government. Each essay is five to six pages, with three or four illustrations. For many there is an emphasis on contemporary aspects.

Japan Atlas It's a great searchable map and many resources about Japanese geography.

Nipponia It's an online quarterly magazine about Japanese culture with articles and many illustrations. You can check out the current issue or search past issues for a specific topic.