These files are not official SEGA distributions. They are frequently hosted on unofficial sites where they may be bundled with malware , trojans, or cryptocurrency miners.
The file is a software update package released by the scene group CODEX for the PC version of Yakuza 4 Remastered . Update Details Version Date: March 26, 2021. Yakuza.4.Remastered.Update.v20210326-CODEX.rar
This update was released shortly after the game's initial Steam launch on January 28, 2021 to address performance issues and bugs found in the early PC build. Critical Security Note These files are not official SEGA distributions