Wow! You lived in Japan before! Yonaguni is near Okinawa under the ocean. When you go back to Japan, Please check my hometown Hokkaido too. There is Oshoro stone Circle in Hokkaido. I shared a picture before. That place is very beautiful. https://steemit.com/art/@koto-art/stone-photos
I like your photos very much so I will visit your blog again! Thank you!