At your map, 'Dokdo' is written as 'Takeshima', 'West Island' is written as 'Nishijina' and 'East sea is written as 'Higashijima.' On your page, 'East Sea' is written as 'Sea of Japan' too.In AD512, Silla Dynasty conquested Dokdo. Since that, Dokdo was territory of Korea. But Japn always want to plunder Dokdo. so Japan government used wrong word, 'Takeshima.'