Located somewhere within the Land of Lightning's many mountain ranges is a valley called the Valley of Clouds and Lightning (雲雷峡, Unraikyō). It's a water-filled valley covered in clouds or fog. Within this valley is a dark cavern where Killer B, the jinchūriki of the Eight-Tails, trains.
For generations, the Yotsuki clan resided in this valley. Because they approved of the First Raikage, they handed over the land to Kumogakure. The valley has been greatly devastated due to Killer B launching a Tailed Beast Ball within the area during his fight against Taka.
- ↑ Naruto chapter 408, page 5