suck off random dudes at cons while in popular cosplay and then post the pics.
insta notoriety

Youtube is your friend, upload some horrendously irritating videos. It'll also help if you're fat and/or ugly, although I'm assuming you already are if THIS is how you get attention...

Be annoying, as annoying as possible.
Be a weaboo, draw bad animu, sing J-pop and upload it to youtube, talk in a cuttesy voice and add weaboo talk such as sugoi and uguuu~~

You can also be a bitch: Big weaboos like PT and NCN are too.

But you're going to have to work a lot.

wow, a PT how-to guide! Who woulda thunk up this little dream. Or you could take some pointers from this chick named magicalpockyusagi...Or what comments remain about her "OMG I'm Niponese,born into a caucasian body" 20$ says PT starts to sy she's a reincrnated Japanese princess yo...

Just post ugly pics of yourself on cgl every day.

I'm a little on the fat side,yeah. As far as ugly...I'd just say I'm "average".
I've got a low quality webcam, so I'll slap together a closet cosplay or dig out my wrinkled old sailor-style uniform and make a video showing off my kawaii self.

Why do you want this?
out of curiosity.

But you should try and gain more weight, while claiming that you're losing a lot. Shoop yourself ridiculous amounts and claim it's not shoop. Wear extra revealing cosplays and pretend that you're Japanese.