Render text/font string to Texture2D

Hello,

I'm trying to render a unicode string of various Japanese characters to a Texture2D. I've seen this blog post from a few years ago but this only works if I can create a font image beforehand which is a little difficult when I have so many (2000+) characters to work with. http://blog.almostlogical.com/2010/08/20/adding-text-to-texture-at-runtime-in-unity3d-without-using-render-texture/

I thought with the release of Unity2D there might be something like this I could use to add text to textures, but I haven't been able to find anything. I have access to Unity Pro if the solution requires a render texture, though it would be great if I could do this in an editor window somehow. Any help would be very much appreciated.