Can I create text overlays in Japanese?

Yes. You can create text layers in Japanese using Cloudinary's image transformations.

For example, the following Ruby command was run in order to create a text style named jp_takao based on the TakaoExGothic font:

Cloudinary::Uploader.text("JP Takao Sample", :font_family => "TakaoExGothic", :font_size => 28, :font_color => "#222222", :public_id => "jp_takao")

Now this style can be used for generating a text layer in Japanese. For example:

http://res.cloudinary.com/demo/image/upload/w_400/l_text:jp_takao:%E3%82%AF%E3%83%A9%E3%82%A6%E3%83%89,g_south_west,y_10,x_10/brown_sheep.jpg

The following font families are currently available: TakaoExGothic, TakaoExMincho, TakaoGothic, TakaoMincho, TakaoPGothic, TakaoPMincho.