Well of course there is no such thing as a Japanese Camel, and as far as I can find out there never has been.
These live in neighboring Tottori at the prefectures most well known tourist site, the Tottori Sand Dunes, where they give tourists short rides in the sand.
These first two photos are of the Bactrician Camel, now native to Mongolia and part of China, though their prehistoric origin was probably North America.
Before I came to Japan, knowing how much I loved the desert my wife tried to convince me that Japan did in fact have a small desert. Tottori sand dunes is what she meant!
There was also a Dromedary or Arabian Camel.
When i was a kid we used to ride camels at the zoo, and one time some years ago I did get up before dawn and ride a camel out into the Sahara to watch sunrise from the top of dunes similar to the ones here in Tottori.