The
JBand (Japanese Angband) project is aimed at developing Unicode and Japanese language support for latest version of Angband (3.1.1). As well as the Japanese users it should also be helpful for people developing Angband versions in other languages.
At present JBand compiles in C++ mode, and only in VC++ due to changes (ham-handed hacks) involved in supporting unicode text handling. My policy is "worry about getting it to work first, worry about portability second". That may not be a very sensible policy in the long run, but I'm a C/C++ novice so achieving the first half is likely to be hard enough.
There are much more details about current status, plans, and FAQs at
the project wiki.
P.S. I just want to link
Angband SVN here because it hardly ever turns up on Google searches.