Current sort name is a guess of correct reading of original japanese name. It is most likely is correct one, as it is by far most common reading for those given and family names and given name is also confirmed by performance name, but please do not use this information as authorative and if you copy it somewhere note that it is unverified. If you have any official MTG-related or some other trusted japanese sources to confirm this name, please either set it to what it should be or leave a note on http://musicbrainz.org/showmod.html?modid=4698816 that it is correct with reference to that source.