It is sold at the post offices in Kagoshima prefecture only. The area is narrow and the sales amount is little, so it is hard to get. It is a sticker stamp, so it don't need any paste and is very convenient.
 The Sogi waterfalls is at Isa city in Kagoshima prefecture. Many waterfalls flow down. The magnificent view is wide and great. The waterfalls must be watched while bathing a cloud of spray. When people visit Kagoshima, they should watch there. In 2010, a bridge behind the waterfalls is under construction to move to the lower reaches. (It is a part of the common road, so the road may be moved.) Its reason is that it is an obstacle to enjoy the waterfalls. I think a view from this bridge is also good and miss it. Therefore the stamps that the bridge is at the back of waterfalls is last. And it will be rare./
 If you want it, we can give a photo of the Sogi waterfalls as an extra.

* Okusatsuma : the inner part of the Satsuma peninsula, the heart of a mountain in the Satsuma peninsula or the northern Satsuma.
The frame postage stamp : A beautiful trip at Okusatsuma
The frame postage stamp : A beautiful trip at Okusatsuma The frame postage stamp : A beautiful trip at Okusatsuma
An extracandidate