Comparing Japanese Strings

I am using String .equals method to compare two japanese strings, but it is returning false even though the strings are equal, but it returns true if the strings are english.
Do i have to do something special to compare japanese strings?

Sorry, i am using UTF-8 encoding, i tried ISO-8859-1 but it didnt worked.
I am using
BufferedReader rdr =
         new BufferedReader(
             new InputStreamReader(new FileInputStream("abc.csv"),"UTF-8"));
String line=rdr.readLine();
String tempArray[] = line.split(",");
System.out.println(xlsobj.Headers.containsKey(tempArray[0]);Headers is a HashMap which contains the japanese string which i want to compare.
I tried to use equals() method in my effort to debug but it is also returning false.

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