Yakehashiri is a cooled and hardened lava flow on the northeastern slope of Mt. Iwate. The lava was from the 1732 explosion, and stretches for about 3 km, reaching a width of about 1.5 km at the lower end. Even after 280 years, no plant life grows on the barren black rocks which form a layer of about 5 to 10 meters thick. There are lava blocks of various sizes, from those that fit the palm of your hand to those with diameters of over 1 m; you are not allowed to take one home because they are national natural monuments. There is a 1-km walkway on the lava; a round-trip will take about two hours. There are facilities such as a campground, a hot spring, and a restaurant nearby.

• Scenic Spot