Take a 20-minute break near Kawahara IC
Use the toilets and convenience store first. If time permits, choose pear soft serve or ago-tenyaki at Bellfull, or bread from Seiryu Bakery. Pick one thing that is easy to eat in the car instead of visiting every shop, so departure stays on schedule.
Parking → toilets → Bellfull or bakery → departure
Most shops open from 9:00 or later. At night or early in the morning, plan on the convenience store and toilets.