Using coco 1102 build.

create uml project and a new class diagram
rename the class name and some attributes and operations
to have multibyte (asian characters) in their names
(which is legal in java and in uml module functionality)

then choose edit->find in model and search for a word
that will show results from this model diagram -

the multibyte shows as boxes, not as it should

compare the multibyte in attached gif of the diagram with
the find model results section

Am guessing this is encoding handling situation - 
This is seen on solaris in ja locale - suggest trying on solaris ja_JP.UTF-8
locale as well - if it looks ok there thats additional info that it can be
encoding handling.