In the archive several saves:

Saving a completed game on different difficulties: from Easy to Legend ("clr" format)
New Game+ saves with saving leveling and items
Saves before the battle with Amon (secret boss)
Save for achievements
If saving in the "sav" and "clr" formats does not work, then simply replace the "system.dat" file from the first folder. If you want to reset everything at once, I advise you to rename the saves in order savegame#.sav (1,2,3 and so on) (it’s the same story with “.clr” files)

Place all files here:

<Steam-folder>\userdata\<user-id>\1088710\remote\ (Steam)

%LOCALAPPDATA%\Packages\SEGAofAmericaInc.Yakuza3PC_<ALPHABETS>\SystemAppData\wgs (Microsoft Store)

<Steam-folder>/steamapps/compatdata/1088710/pfx/ (Steam Play, Linux)

Author: MITSUYOSHI