Met Joi, Adam and about 10 other people to go to the march. As far as I can tell, a total of about 5,000 people turned up. Mostly Japanese, but a large number of foreigners from many different countries.
We started at Yamashita park and went around most of Shibuya, crossing Hachiko and returning to the park. There were also a lot of people standing on the side-walks and overhead bridges. Some of the signs people were holding and their dresses were really interesting. I got about 50 photos of the event, but it was quite dark so not all are very clear. Will post the good ones later.