语法错误应该是没有的.
但是“亚洲太平洋海岸”表达不是很自然啊,应该用”the eastern pacific coast of Asia“比较合适.
后面再稍作修改,我觉得这样比较好:
”Japan is located on the eastern pacific coast of Asia,including Hokkaido,Honshu,Kyushu,Shikoku,the 4 major islands ,and more than 6800 other small islands.“