We are interested in going from Tokyo - Nagoya - Osaka - Kyoto - Hiroshima - Tokyo, or thereabouts. We are interested in paying extra for the green car rail pass for the added comfort and convenience in booking. The cost differential is not a concern.

We will be 2 families (western background), 4 adults, 2 ten year olds, 2 seven year olds, and a 2 year old. While I expect that the 10 and 7 year olds will be "controllable", we would deem this by Western standards. The 2 year old could be unpredictable. We should have considerable luggage.

How tolerant would the situation be in a green car (I travel business class on planes and have had my share of crying infants who generally go uncommented) in Japan? Any additional thoughts and concerns?

Thanks.