We were introduced to a great Japan cycling story, American Charles Scott, who not only decided to ride the length of Japan by bike, but, and this is the really adventurous part, he did it with his 8-year old son, Sho.
Tokyo could start limiting the number of vehicles transiting the city -- think of Singapore and its various toll charging and vehicle registration systems, which have kept annual vehicle growth down to just 1.5% a year.