Seven kilometers where the surface quality varies section by section. Smooth asphalt transitions into rougher patches. Grip levels change mid-corner. What worked two turns ago might not work here. Tsuchisaka doesn't test your ability to drive one type of road perfectly — it tests your ability to adapt as conditions shift beneath you.

This is Gunma's surface reading test. Not technical mastery. Not power deployment. Just the ability to feel when grip changes and adjust your pace accordingly. Drivers who rely on memorization struggle — the surface condition you memorized last week might not exist today. Drivers who read the road through the steering wheel and seat-of-pants feel thrive. The road teaches you, but only if you listen.

Character: Variable surface with changing grip levels. Medium-speed technical sections where adaptability beats setup. Cars with good feedback and predictable handling dominate. Highly tuned track cars optimized for perfect asphalt struggle when conditions change. This is a driver adaptability test.