encoded double byte characters string conversion

I have double byte encoded strings stored in a properties file. A sample of such string below (I think it is japanese):

\u30fc\u30af\u306e\u30a2

I am supposed to read it from file, convert it to actual string and use them on UI. I am not able to figure how to do the conversion -- the string contains text as is, char backslash, char u, and so on. How to convert it to correct text (either using ai::UnicodeString or otherwise)?

Thanks.