读下图回答：

（1）将岛屿名称的代号填在图上：A北海道岛 B本州岛 C四国岛 D九州岛

（2）将图中代号所在的工业区名称填写在下列横线上：

①                 ④                  ⑤                      ⑦                        ⑨                          

（3）日本经济的特点是：    

①                                                                                                            

②                                                                                                        

③                                                                                                        

（4）日本工业集中在太平洋沿岸的原因是                                                                                  。