第2日目(西表〜由布島〜石垣) https://rio.st/2004/02/28/%e7%ac%ac2%e6%97%a5%e7%9b%ae%ef%bc%88%e8%a5%bf%e8%a1%a8%e3%80%9c%e7%94%b1%e5%b8%83%e5%b3%b6%e3%80%9c%e7%9f%b3%e5%9e%a3%ef%bc%89/