Mountainous and volcanic, Honshu experiences frequent earthquakes. The highest peak is the active volcano Mount Fuji at 3,776 m (12,388 ft), which makes Honshu the world's 7th highest island. There are many rivers, including the Shinano River, Japan's longest. The Japanese Alps run the length of Honshu, dividing the northwestern (Sea of Japan) shore from the southeastern (Pacific or Inland Sea) shore. The climate is generally humid subtropical in the southern and coastal parts of the island and humid continental in the northern and inland portions.
Honshu had a population of 103 million as of 2005, mostly concentrated in the coastal lowlands, notably in the Kanto plain where 25% of the total population resides in the Greater Tokyo Area. As the historical center of Japanese culture and political power, the island includes several past Japanese capitals, including Kyoto, Nara, and Kamakura. the epicenter approximately 70 kilometers (43 mi) east of the Oshika Peninsula of Tohoku. The earthquake triggered powerful tsunami waves that reached heights of up to 40.5 meters (133 ft) in Miyako in Tohoku's Iwate Prefecture, and which, in the Sendai area, traveled up to 10 km (6 mi) inland.
Japan experiences a number earthquakes. It lies near a major plate boundary. However it had never seen an earthquake of this magnitude since modern recording began in 1900. On 10 March 2015, a Japanese National Police Agency report confirmed 15,894 deaths, 6,152 injured, and 2,562 people missing across twenty prefectures, as well as 228,863 people living away from their home in either temporary housing or due to permanent relocation. Japan is still recovering from the 2011 earthquake and tsunami.