A little update: My friend Yuki-chan (maid cosplayer) is asking if I would go to Nihongo Fiesta, will be held at Skydome. Unfortunately, it's the same day as UP AME. This clearly shows something I haven't mentioned before about Philippine anime cons - there appears to be an unspoken rivalry between large sponsors. They sometimes schedule their event on the same day as another group.
It seems like your country has a good amount of anime fans (talking about your cosplayer story with the girl and the photo shoot). Your country might have a higher percentage of anime fans than America. America certainly has it's anime fans, but there are a lot of areas of the country where their numbers are low. In my state and in my area, there aren't too many anime fans. I live not too far from Boston, and there is at least one anime convention that is held there yearly. But I live in a rural area, and the amount of anime fans isn't that much.
And something completely unexpected today. There's no anime convention. I was just casually going home from a mall today on a public jeep (we have those long jeeps here that are used as public transport vehicles). Halfway through the trip. A Kagome cosplayer flagged the jeep and she went aboard. I'm sure she's a cosplayer because the bow is in her bag.
After consulting with my cosplayer friends. It's decided that the cosplayer I encountered is probably just going home from a photoshoot. Since there's no known convention today. I guess cosplaying is becoming a little more popular here.