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Ecotourism or green tourism started getting attention in Japan about 15 years ago, and if you carbon offset your airticket (which some tour agencies will now help you with) you could probably spend a rather planet-friendly week or two over in these parts of the woods. Rent-a-car? Oh, do pick up a Prius, but high speed trains are the most convenient way to get around, and there are local trains and bus services connecting even the most rural parts of the country to Tokyo and Osaka, the 2 largest cities. Here is a brief list of things to do on a greenish summer holiday to Japan:

1) Hotsprings - enjoy the volcanic...