Dear Sanji,
The 2 websites are in Japanese. I wish I could understand.
I will be in Japan from 20 Nov to 6 Dec. Could you suggest any interesting places to visit to enjoy beautiful koyou?
I will be traveling from Tokyo to Kagoshima during those 16 days.
Again many thanks in advance.
Rob

End of November - early December is really late... You might probably have a chance in the Chugoku and Kyushu part of Japan, but of course it is difficult to predict how things will be.

If you select the second link : http://www.walkerplus.com/koyo/
1) Click on the map on the area you are interested in
2) Choose the period you will be traveling in the "見ごろ検索" list (left menu), you can select the date with "11月下旬" (last 10 days of November) and "12月上旬" (first 10 days of December).
3) You will get a list of the most interesting spots in that area (if you can not exactly understand the location, just copy the address in googlemap, it will locate the spot for you).

Hope this helps,

sanji

http://www.walkerplus.com/koyo/

Thank you again Sanji.
As you said could be too late for our trip.
We will be traveling as far south as Kagoshima by late November,hoping still opportunity to get a glimpse of these beutiful scenery.

I found this link for the Japanese Fall Foliage Best Destinations.
Hopefully it is useful for future ref.
http://gojapan.about.com/cs/fallfoliages/l/bljafallfoliage.htm

Koyo season is now at its peak! Enjoy a week-end in the countryside, or wait for the leaves to turn red in Tokyo and Kyoto in a couple of weeks... Here are two links (in Japanese) to help you find the best locations.

Le pic de la saison Koyo est maintenant atteint! Profitez d'un week-end à la montagne, ou attendez encore quelques semaines pour que les feuilles deviennent rouges à Tokyo et Kyoto également... Ci-dessous, deux liens pour trouver les meilleurs endroits (en Japonais).

kouyou.nihon-kankou.or.jp & www.walkerplus.com/koyo (in Japanese)
gojapan.about.com/cs/fallfoliages/l/bljafallfoliage.htm (in English)