الأرخبيل الياباني
The northern part of the Japanese archipelago was further fragmented until orogenesis of the northeastern Japanese archipelago began in the Late Miocene. The orogenesis of the high mountain ranges in northeastern Japan started in the Late Miocene and lasted in the Pliocene. The south part of the Japanese archipelago remained as a relatively large landmass. The land area expanded northward during the Miocene.