URL https://www.researchgate.net/publication/341427624/figure/fig19/AS:1084229874126930@1635511954543/Multijump-connections-from-Japanese-ports-a-Global-view-all-b-Regional-view.jpg
URL2 https://www.researchgate.net/figure/Multijump-connections-from-Japanese-ports-a-Global-view-all-b-Regional-view_fig19_341427624
