Like a Dragon Gaiden: The Man Who Erased His Name

This achievement requires you to obtain 10 different items that you can equip on your character in the Gear menu from the Pause screen. You can get a major headstart from the Wanpark Clothier store in the eastern part of Ashitaba Park, with eight pieces of gear available to buy at a combined price of 206,000 yen. You can get the remaining two items to unlock this achievement from the Ebisu Pawn Sotenbori shop, where the items offered there and not at Wanpark are the Rusted Chainmail, Payback Ring, mini-more perfume, and Hariti's Amulet. Those items run a combined total of 29,320 yen. (Feel free to chime in if I missed anything else).