If you are new in the business we would suggest that you initially make contact by email with as many agents/agencies as possible everywhere and send them the link to your new website. Also if you are using an online talent agent like for instance https://en.stagepool.com having a website linked to your account makes clients regard you as more professional which enhances your chances of getting booked.
This market today is global and you might just be right for a model agency in Tokyo regardless of how big or small your portfolio is. That is the magic with this setup, your website will make people want to look at your material because it is all presented in such a beautiful way. This makes them so much more inclined to take notice of you.