Here are the times for the main areas in Japan for autumn leaves. For a nearby area the timings will be very similar. Enjoy some pics here.
Osaka – Mid November to early December
Kyoto – Mid November to early December
Hokkaido – Early September to late October
Nara – Early to early December
Hakone – Late October to early November
Nikko – Early October to mid November
Nagoya – Late October to early December