Contains the Japanese Voices & Sound Files, after installing the game simply replace the files in the installation folder with these ones, there's some dialogue in the game so this should be worth it. Remember to backup the old files because you might need them for future patches. ALSO after replacing the files and starting the game change Voices in the Options to Japanese, don't forget this.
Also contains a full save file for FC. This will change some of the NPC interactions and make some items easier to get and give you an easier time at the start of the game, if you completed the first game (which you should have) this is actually meant to be use, it's not a cheat. Simply drop this file on C:\Users\User\Saved Games\FALCOM\ED6\ Where User is the name of your machine. It'll ask you to load it at the start of the game.
Left in the extras as well this time because why not.
If you like the game, buy it on GOG or Steam, support future releases.