It is probably better to just use a normal font installed on the system (or webfonts if you wanna put up with the load time every time). At least you can be sure that all characters will display. Sure, you can also only use Hiragana, Katakana and write everything with it like japanese kids would that just have begun learning the language, but I don't think it is optimal. Not to mention that that won't work for languages like Chinese or Korean.
What's btw the best way to suggest Construct 2 to use fonts like in html.
For example how to implement something like this:
font-family:"?????? Pro W3", "Hiragino Kaku Gothic Pro",Osaka, "????", Meiryo, "MS P????", "MS PGothic", sans-serif;
(this list could probably be expanded by fonts installed on android/ios that support kanji)