Curated websites and guide services for getting around Japan are rapidly increasing to meet the needs of the rising number of people visiting to Japan. However, the more websites/services, the more complications. So, VisitJapanPlaces put them in one place to know which is the best suit for you easily. Use this page as your basement for your wonderful trip to Japan.
Since they founded in 1996, japan-guide.com has played a main role to introduce Japanese things/places in English. Although their Japan Question Forum is useful for people visiting (or planning to visit) Japan, their original contents covering the fundamentals on Japan are also useful before you actually visit. One of their contents "Japan Penfriends" is a unique service to make friends with locals in Japan.
This website is, as the name indicates, mainly managed by an expert traveller Nomadic Matt. He is also a Japanophile, so, there are many detailed & organized articles on Japanese things/places written by him. Among them, "A Complete Guide to Traveling Japan" must be your help. Of course they has a forum for a trip to Japan.
Fodor's Travel is the oldest publisher of English language travel and tourism information in the US. They have launched a travel-related website in 1996, which has lots of features & trip ideas. Their JAPAN forum is simply divided into two categories ACTIVITY qustions & TRIP REPORTS and the feeds are compatible with RSS so that you can easily follow them.