It was a lovely day and weekend for the event, and although I haven't heard or seen a final total for how many were in attendance, I assume they hit their estimated mark of 130,000. It was good to see such enthusiasm, whether well directed or not. These sorts of things always have their pros and cons, but it is still a beginning, a place to move from where we are now.
I do recommend cruising the assorted sites and pages linked to Earth Day Tokyo 2009. While I can't read a think except for the occasional letter, I really enjoyed myself. This link and its accompanying graphic of a seed sprouting and then blooming (tane is seed in Japanese) is probably one of the loveliest I've ever seen.