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