Summary:

• The system has been modified to support COBOL source code written in UTF-8, including multibyte characters.
• In licobj, all multi-byte characters are handled as SJIS.
• Literals, variable names, and label names written in UTF-8 multi-byte characters are written as UTF-8 in the generated Java files.
• In Opensource COBOL 4J, some UTF-8 handling code inherited from Opensource COBOL remained. This code was partially reused or modified.
• A new cobol-utf8 test was added, and all the tests are passing.

Note:

• Although modifications have been made to handle a wide range of Japanese characters, there's a possibility of unexpected errors if specialized kanji are used.

Details:
For more details, please check the cobol-utf8 test

• VALUE clause
  example：

  01 N-str PIC N(n) VALUE "日本語文字列".
  01 X-str PIC X(n) VALUE "日本語文字列".
  

• MOVE statement
  example：

  MOVE "日本語文字列" TO N-str.
  MOVE "日本語文字列" TO X-str.
  

  01 F0 PIC XXXXXX/XXXXXXBXXXXXX0.
  MOVE "日本中国文字" TO F0.
  

• DISPLAY statement
  example：

  DISPLAY "いろは".
  DISPLAY N"いろは".
  DISPLAY NC"いろは".
  DISPLAY ND"いろは".
  DISPLAY NX"E38184E3828DE381AF".
  

• Reference modification
  example：

   01  X項目 PIC N(5) VALUE "ＡＢＣＤＥ".
   DISPLAY X項目(3:2).
   DISPLAY X項目(3:).
  

• PROGRAM-ID.
  example：

  • PROGRAM-ID. いろは.
    • java file name : _E38184_E3828D_E381AF.java
    • class name: _E38184_E3828D_E381AF

• file handler name and file path
  example：
  SELECT 日本語ファイル ASSIGN TO "./日本語ファイル"

• label name
  example：

   PROCEDURE        DIVISION.
       見出し.
   	STOP RUN.
  

• field name
  example：

   01  I項目         PIC 9 VALUE 2.
  

• STRING statement
  example：

   01 F0 PIC N(2)  VALUE "私の".
   01 F1 PIC N(3)  VALUE "名前は".
   01 F2 PIC N(5) VALUE "ありません".
   01 FF PIC N(10).
   STRING F0 F1 F2 DELIMITED BY SIZE INTO FF.
  

  01 F0 PIC N(2)  VALUE "私の".
  01 F1 PIC N(4)  VALUE "名前△は".
  01 F2 PIC N(6) VALUE "△ありません".
  01 FF PIC N(4).
  STRING F0 F1 F2 DELIMITED BY "△" INTO FF.
  

  01 F0 PIC N(2)  VALUE "私の".
  01 F1 PIC N(3)  VALUE "名前は".
  01 F2 PIC N(5)  VALUE "ありません".
  01 FF PIC N(10) VALUE "言えません◎○△■※".
  01 FP PIC 99    VALUE 16.
   STRING F0 F1 F2 DELIMITED BY SIZE INTO FF WITH POINTER FP.
  

• INSPECT statement
  example：

  01 F0 PIC X(30)  VALUE "１２３４５１２３４５".
  INSPECT F0 REPLACING ALL "５" BY "０".
  INSPECT F0 REPLACING ALL "５" BY ZERO.
  INSPECT F0 TALLYING CN FOR ALL "４５".
  

• FUNCTION NATIONAL
  example：

  MOVE "AＢC１2３" TO I-STR.
  MOVE FUNCTION NATIONAL(I-STR) TO O-STR.