Tomcat must use the same encoding to decode them as you used for encoding. That means that you have two possibilities:
1) You modify the encoding for encoding to the one Tomcat uses (which probably won't work as these characters don't look like many encodings support them).
2) You modify the encoding Tomcat uses to the one you use for encoding.
You may not want to (or cannot) choose option 2, but unless you can get option 1 to work you have no other option.