The 1998 Nissan R390 GT1 is easily one of the most iconic Japanese supercars ever built, and having it tucked away as a hidden gem in Forza Horizon 6 makes it a top-priority target for most players. However, if you try to rush out to the countryside to find it right after finishing the prologue, you will only find an empty landmark. The game locks this legendary machine behind specific campaign milestones.
To get your hands on the Nissan R390 GT1 as quickly as possible, you must first unlock Level 6 (the Adventurer tier / Purple Stamp) in the Discover Japan campaign. Once that prerequisite is hit, you can bypass the tedious hunting zones and drive straight to its hidden barn location in the Ohtani region. This guide breaks down the fastest route to hitting that level and pinpointing the exact location of the barn.
Step 1: Fast-Track to Campaign Level 6 (Adventurer)
Barn finds in Forza Horizon 6 are tied strictly to your overall campaign progression. If you drive to the location without reaching the required tier, the cutscene will not trigger, and the barn doors will stay firmly shut. To push your Discover Japan stamp level up quickly, open your campaign menu, keep an eye on your progress via the Collector's Journal, and prioritize these specific high-yield activities:

• Story Missions: Focus heavily on completing the yellow map markers. These main narrative threads award the single largest chunks of campaign progression points available.
• Touge and Road Races: Grind out high-speed circuit clears. Circuit races are generally faster to repeat and clear cleanly compared to long point-to-point cross-country events.
• Regional Mascots: Do not ignore the regional collectibles. Smashing these items while driving between major race events provides easy, passive chunks of points that build up rapidly over time.
• House Purchases: Save some credits for real estate. Buying up cheaper player houses across the map instantly crosses key point thresholds, letting you skip chunks of the race grind entirely.

Step 2: Navigate Directly to the Barn Location
The moment you hit Level 6 and secure your Purple Stamp, the game will officially activate the search zone on your map. Instead of wasting time driving around in circles looking for clues, you can skip the search phase and head directly to this exact spot:

• The Region: Head down to Ohtani, which is situated in the southwest corner of the map, right along the border of Shimanoyama.
• The Route: Navigate toward the Bridge Underpasses Trailblazer gate. Pinpoint the main connecting road that runs directly between Ohtani and Shimanoyama.
• The Trail: Look closely just to the left of the Trailblazer gate. You will spot an off-road gravel path marked clearly by two white signs.
• The Barn: Take this winding dirt trail and follow it all the way up the hill, passing the scenic Kinkaku-Ji temple area. The barn is nestled right at the peak of the hill.

Quick Navigation Tip: If you align your map view with the Kinkaku-Ji temple landmark, simply look just past it toward the higher elevation contours. The dirt path leads directly to the structure.
Step 3: Fast-Track the Restoration Process
Once you arrive and trigger the barn find cutscene, the battered Nissan R390 GT1 is sent straight to your garage. It won't be driveable immediately because it needs to undergo a full mechanical restoration.
While the game encourages you to spend a massive amount of hard-earned credits to instantly buy out the restoration timer, you should avoid doing this. The free, fast method is incredibly straightforward: simply go out and complete 3 to 5 standard road races or Horizon stories. The game calculates restoration progress based on event completions rather than purely real-world time, so active racing will have the car completely repaired and ready for your garage in no time.