After the scripted Buggy race head for the ‘Neon District North’ and you will encounter a guy near an Arcade Store.
Apparently he has an Arcade Shop but unfortunately he has no Arcades and the shop remains empty. Kenshiro is now tasked with the job of hunting down Arcades for the store.
In order to do so you must first get into a battle and hopefully manage to get a Treasure Map as a reward. Once you have a Map you will then need to hunt down the Treasure! Now this is all random and can be rather grindy. What you will hopefully manage to achieve though through using a Treasure Map is to get an Arcade from one of the Treasure boxes! After achieving this you can return to the guy at the Store. You will NEED to get all of the different Arcades in order to complete the quest, there are a total of 4 different ones to track down!
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