A file containing Japanese characters often results in garbled file names (mojibake) when extracted on a system not set to Japanese locale. This happens because the archive likely uses an old non-Unicode character encoding (like Shift-JIS/Code Page 932) to store filenames.
Use the -mcp switch with Code Page 932 (Japanese) to extract: 7z x "YourFile.7z" -mcp=932 Japanese.7z
Modern 7-Zip fully supports Unicode, but if the archive was created with an old tool using SJIS, it needs special handling. A file containing Japanese characters often results in
Restart your computer, extract the file, then change it back. Method C: Use Bandizip or WinRAR (Alternative) extract the file
Version 19 and later have improved handling of Japanese half-width kana, reducing the occurrence of garbled text.
