I am sure this is old news, but I just bumped into this Google service in Japan, and I love it!
From the Google.co.jp webpage, filed under iroiro (second tab). This screen capture may be handy:
Following that you can enter Address or station location and get recommendations on routes for either trains or a car. Now, Yahoo provide a similar (and very good) service for a long time, but what I found helpful is the integration to street view, when car route is selected.
See another screenshot
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