Yamagata Prefecture in the context of "Miyagi Prefecture"

The Tōhoku region (東北地方, Tōhoku-chihō; IPA: [toːhokɯ̥ tɕiꜜhoː]), Northeast region, Ōu region (奥羽地方, Ōu-chihō), or Northeast Japan (東北日本, Tōhoku Nihon) consists of the northeastern portion of Honshu, the largest island of Japan. This traditional region consists of six prefectures (ken): Akita, Aomori, Fukushima, Iwate, Miyagi, and Yamagata.

Tōhoku retains a reputation as a remote, scenic region with a harsh climate. In the 20th century, tourism became a major industry in the Tōhoku region.

Niigata Prefecture (新潟県, Niigata-ken; Japanese pronunciation: [ɲiː.ɡa.ta, -taꜜ.keɴ, ɲiː.ŋa-]) is a prefecture in the Chūbu region of Honshu of Japan. Niigata Prefecture has a population of 2071066 (1 October,2025) and is the fifth-largest prefecture of Japan by geographic area at 12,584.18 km (4,858.78 sq mi). Niigata Prefecture borders Toyama Prefecture and Nagano Prefecture to the southwest, Gunma Prefecture to the south, Fukushima Prefecture to the east, and Yamagata Prefecture to the northeast.

Niigata is the capital and largest city of Niigata Prefecture, with other major cities including Nagaoka, Jōetsu, and Sanjō. Niigata Prefecture contains the Niigata Major Metropolitan Area centered on Niigata with a population of 1,395,612, the largest metropolitan area on the Sea of Japan coast and the twelfth-largest in Japan. Niigata Prefecture is part of the historic Hokuriku region and features Sado Island, the sixth largest island of Japan in area following the four main islands and Okinawa Island.

Fukushima Prefecture (福島県, Fukushima-ken; Japanese pronunciation: [ɸɯ̥.kɯꜜ.ɕi.ma, -kɯ.ɕi.maꜜ.keɴ]) is a prefecture of Japan located in the Tōhoku region of Honshu. Fukushima Prefecture has a population of 1,771,100 (as of 1 July 2023) and has a geographic area of 13,783.90 square kilometres (5,321.99 sq mi). Fukushima Prefecture borders Miyagi Prefecture and Yamagata Prefecture to the north, Niigata Prefecture to the west, Gunma Prefecture to the southwest, and Tochigi Prefecture and Ibaraki Prefecture to the south.

Fukushima is the capital and Iwaki is the largest city of Fukushima Prefecture, with other major cities including Kōriyama, Aizuwakamatsu, and Sukagawa. Fukushima Prefecture is located on Japan's eastern Pacific coast at the southernmost part of the Tōhoku region, and is home to Lake Inawashiro, the fourth-largest lake in Japan. Fukushima Prefecture is the third-largest prefecture of Japan (after Hokkaido and Iwate Prefecture) and divided by mountain ranges into the three regions of Aizu, Nakadōri, and Hamadōri.

Dewa Mountains (Japanese: 出羽山地) is a mountain range that runs north and south on the west side of the Tohoku region of Japan. The mountain range spans Aomori, Akita, and Yamagata prefectures. The Dewa Mountains are split into several sub-ranges by the Yoneshiro River, the Omono River and the Mogami River. These sub-ranges include the Shirakami Mountains, the Tahei Mountains, The Choki Mountains, and the Chotake Mountains.The highest peak of the mountain range is Mount Chokai (2,236m).

Akita Prefecture (秋田県, Akita-ken; Japanese pronunciation: [aꜜ.kʲi̥.ta, a.kʲi̥.taꜜ.keɴ]) is a prefecture of Japan located in the Tōhoku region of Honshu. Its population is estimated 915,691 as of 1 August 2023 and its geographic area is 11,637 km (4,493 sq mi). Akita Prefecture is bordered by Aomori Prefecture to the north, Iwate Prefecture to the east, Miyagi Prefecture to the southeast, and Yamagata Prefecture to the south.

Akita is the capital and largest city of Akita Prefecture. Other major cities include Yokote, Daisen, and Yurihonjō. Akita Prefecture is located on the coast of the Sea of Japan and extends east to the Ōu Mountains, the longest mountain range in Japan, at the border with Iwate Prefecture. Akita Prefecture formed the northern half of the historic Dewa Province with Yamagata Prefecture.

Dewa Province (出羽国, Dewa no Kuni; Japanese pronunciation: [deꜜ.wa (no kɯ.ɲi)]) was a province of Japan comprising modern-day Yamagata Prefecture and Akita Prefecture, except for the city of Kazuno and the town of Kosaka. Dewa bordered on Mutsu and Echigō Provinces. Its abbreviated form name was Ushū (羽州).

The Zaō Mountains (蔵王連峰, Zaō Renpō), commonly called Mount Zaō, are a complex cluster of stratovolcanoes on the border between Yamagata Prefecture and Miyagi Prefecture in Japan. The central volcano (one of the 100 Famous Japanese Mountains) includes several lava domes and a tuff cone, Goshiki-dake, which contains a crater lake named "Okama". Also known as the "Five Color Pond" (五色沼, goshiki numa) because it changes color depending on the weather, it lies in a crater formed by a volcanic eruption in the 1720s. The lake is 360 metres (1,200 ft) in diameter and 60 m (200 ft) deep, and is one of the main tourist attractions in the area.

One striking feature of Zaō's famous ski resorts are the "frost-covered trees" (樹氷, juhyō) that appear in mid-winter. Strong wind over the nearby lake fling water droplets which freeze against the trees and their branches, until near-horizontal icicles begin to form. Falling snow settles on the ice formations, with the end result being grotesque figure of a tree. The effect of a full forest of such trees gives visitors a ghostly impression, hence they are colloquially known as "snow monsters". Formed under precise precise meteorological and ecological conditions almost unique to northern Japan, the phenomenon is has been decreasing due to climate change.