Cosplay is people wearing cloths and making up as similar as their fan of Animation, game or manga character.
I remember young manga lover start wearing Rum chan, Ranma1/2, Gundum costume
in “Doujinshi”, publication aimed at a particular hobby group, party in 80’s.
I saw many photographies in “Animedia“, animation magazine.
I would like to introduce cosplay sight seen area in Tokyo.
You can see cosplayers, cosplay people, at Jingu bridge next to Harajuku station every sunday.
I think people around this place wear more fashionable style than others.
Akihabara is famous as electronic shopping city, but also good place to see cosplayers.
You might see them in the street weekdays. There are many players are coming especially at a pedestrian precinct on Sunday and public holiday.
Most number of people wear fancy maid cosplay dress. because of that Japanese geeks like maid cosplay girl.
Thus, maid cafe is becoming popular around the area. In that cafe, Maid cosplay girls works for customers nicely.
They offer to play game, take photos or Karaoke. You could enjoy at this place even with girl friends.
made cafe
http://www.cafe-athome.com/about-english/
Many cosplay shop in Akihabara as well. You can find your favourite cosplay costume around the city.
cosplay shop
http://www.k-books.co.jp/company/shop/akiba-cos.html
If you want to see big cosplay party in Japan, going to cosplay party is the best. You can find the schedule in on line.
The party is occartionaly having in amusement park, pubic hall or theatre.
Some cosprey events are in overseas. Once I enjoyed in Sydney!
loveartlab 
Hey there my name is Sally and I’m a blogger and this article really aided me. I’m enthused! Thanks very much!
Thanks Sally, If you want to know something Japanese culture things.
Please, ask me.
Cheers.