MySQL 8.0 FAQ: MySQL Chinese, Japanese, and Korean Character Sets Character Name ucs2 sjis cp932 ujis eucjpms REVERSE SOLIDUS 005C 815F 5C 5C 5C FULLWIDTH REVERSE SOLIDUS FF3C 3F 815F 3F A1C0 WAVE DASH 301C 8160 3F A1C1 3F FULLWIDTH TILDE FF5E 3F 8160 3F A1C1 DOUBLE VERTICAL LINE 2016 8161 3F A1C2 3F PARALLEL TO 2225 3F 8161 3F A1C2 MINUS SIGN 2212 817C 3F A1DD 3F FULLWIDTH HYPHEN- MINUS FF0D 3F 817C 3F A1DD CENT SIGN 00A2 8191 3F A1F1 3F FULLWIDTH CENT SIGN FFE0 3F 8191 3F A1F1 POUND SIGN 00A3 8192 3F A1F2 3F FULLWIDTH POUND SIGN FFE1 3F 8192 3F A1F2 NOT SIGN 00AC 81CA 3F A2CC 3F FULLWIDTH NOT SIGN FFE2 3F 81CA 3F A2CC ucs2 sjis cp932 NOT SIGN 00AC 81CA 3F FULLWIDTH NOT SIGN FFE2 3F 81CA Now consider the following portion of the table. This means that MySQL converts the  NOT SIGN  (Unicode  U+00AC ) to  sjis  code point  0x81CA and to  cp932  code point  3F . ( 3F  is the question mark (“?” . This is what is always used when the conversion cannot be performed.) Our answer is: “?” . There are disadvantages to this, and many people would prefer a “loose” conversion, so that  81CA (NOT SIGN)  in  sjis  becomes  81CA (FULLWIDTH NOT SIGN)  in cp932 . A problem arises because some versions of Japanese character sets (both  sjis  and  euc ) treat  5C as a  reverse solidus  ( \ , also known as a backslash), whereas others treat it as a yen sign ( ¥ ). A.11.5. What should I do if I want to convert SJIS  81CA  to  cp932 ? A.11.6. How does MySQL represent the Yen ( ¥ ) sign? 5262