We are thinking about taking shinkansen to Fukuoka and then visit Nagasaki and Beppu (possibly some place in the mountains as well) and probably stay a night or two in both places. Then back to ...
Are there any good snorkeling sites around Kyushu in southern Japan? Is it warm enough to do this in April? (Context: newbie snorkelers... one or two days. Preferably not an island outside of Kyushu.) ...