[BroJoeK]

cajin: "Since 'suribachi' 摺鉢 is the Japanese word for a mortar-and-pestle bowl, the name is probably as much a description of the mountain..."

Compare to Mt. Suribachi:

[chajin]

I’ve tried this morning, but I cannot find a photo of Kasado Island’s Suribachiyama on the net. All the pictures taken on the island are pointed out into the bay rather than inland at the mountain, and there are no pictures I can find from the peninsula showing the island. If you look at Google Earth there seems to be a depression in the Kasado mountain, but nothing as pronounced as in Mr. Suribachi Ioto (Iwo Jima).