Jōmon period The
Jōmon period is the time between , during which Japan was inhabited by the
Jōmon people, a diverse
hunter-gatherer and early agriculturalist population. The oldest evidence of pottery in Japan was found at the
Ōdai Yamamoto I Site in the town of
Sotogahama in the northwestern part of the prefecture. The relics found there suggest that the
Jōmon period began about 15,000 years ago. By 7,000 BCE, fishing cultures had developed along the shores of the prefecture. Around 3,900 BCE, settlement at the
Sannai-Maruyama Site in the present-day city of
Aomori began. The settlement shows evidence of wide interaction between the site's inhabitants and people from across Jōmon period Japan, including Hokkaido and
Kyushu. The Jōmon period continued up to 300 BCE in present-day Aomori Prefecture at the
Kamegaoka site in the city of
Tsugaru where small statuettes called
Shakōkidogū have been found. The Yayoi people were mostly Chinese immigrants and their descendants. Historic records mention a series of destructive eruptions in 917 from the volcano at
Lake Towada. The eruptive activity peaked on August 17. The
Heian period, , was characterized by centralized government influenced by China. Throughout this period, the Emishi were slowly subdued by the
Imperial Court in Kyoto before being incorporated into
Mutsu Province by the
Northern Fujiwara around 1094. The Northern Fujiwara continued to rule the Tōhoku region until 1189. Mutsu Province was a large province that was later broken into
Fukushima,
Miyagi,
Iwate, and Aomori Prefectures and the municipalities of
Kazuno and
Kosaka in Akita Prefecture. The Northern Fujiwara set up the port settlement of
Tosaminato in present-day
Goshogawara to develop trade between their lands, Kyoto, and continental Asia. The Northern Fujiwara were deposed in 1189 by
Minamoto no Yoritomo, who would go on to establish the
Kamakura shogunate, which is known for the emergence of the
samurai, the warrior caste, and for the establishment of
feudalism in Japan.
Kamakura period The
Kamakura period is a phase that marks the governance by the
Kamakura shogunate between .
Minamoto no Yoritomo incorporated Mutsu Province into the holdings of the Kamakura shogunate. Nanbu Mitsuyuki, founder of the
Nanbu clan, was awarded vast estates in Nukanobu District after he had joined Minamoto no Yoritomo at the
Battle of Ishibashiyama in 1180 and the conquest of the Northern Fujiwara. Nanbu Mitsuyuki built
Shōjujidate Castle in what is now
Nanbu, Aomori. During this time, the Emishi were gradually assimilated into the warrior class.
Buddhism expanded greatly in Japan during this period, with six new schools of Buddhism being founded:
Pure Land,
Rinzai, ,
Sōtō,
Nichiren school, and the
Ji-shū branch of Pure Land. While these new schools of Buddhism spread to Aomori Prefecture, the process was slow due to the distance from Kamakura. Buddism is Aomori remained strongly blended with older schools of Buddism in Aomori Prefecture, especially
Shugendō and
Tendai.
Muromachi period The
Muromachi period, , saw the rise of the
Muromachi or Ashikaga shogunate and
Onmyōji, practitioners of astronomy and divination, into high governmental positions. At the onset of the
Ashikaga shogunate, the Nanbu and Andō continued to rule the area, with the Nanbu controlling the current prefecture's southeastern section and the Andō controlling the
Shimokita and
Tsugaru peninsulas. The Andō also were involved with controlling the fringes of Ezo, splitting their attention. In 1336, the Andō completed construction of
Horikoshi Castle during the
Northern and Southern Courts period. During the Muromachi, the Nanbu slowly began edging the Andō out of present-day Aomori Prefecture. The Andō were pushed out of Tosaminato in 1432, retreating to Ezo, giving the Nanbu control over all their lands. The port settlement would fall into disrepair under the Nanbu. By this timeframe the Emishi no longer existed as a distinct
polity, but their culture was still influential. Relations with the Ainu in Hokkaido were still strong.
Sengoku period The
Sengoku period of the 15th and 16th centuries is an era in which civil wars and social upheavals took place almost continuously, similar to the
Early Middle Ages in Europe. During the Sengoku period, the Nanbu clan collapsed into several rival factions. One faction under
Ōura Tamenobu asserted their control over the
Hirosaki Domain. His clan, originally the , was of uncertain origins. According to later Tsugaru clan records, the clan was descended from the noble
Fujiwara clan and had an
accent claim to ownership of the Tsugaru region on the Tsugaru Peninsula and the area surrounding Mount Iwaki in the northwestern corner of Mutsu Province; however, according to the records of their rivals, the Nanbu clan, clan progenitor Ōura Tamenobu was born as either Nanbu Tamenobu or Kuji Tamenobu, from a minor branch house of the Nanbu and was driven from the clan due to discord with his elder brother. In any event, the Ōura were hereditary under the Nanbu clan's local magistrate Ishikawa Takanobu; however, in 1571, Tamenobu attacked and killed Ishikawa and began taking the Nanbu clan's castles in the Tsugaru region. He captured castles at Ishikawa, Daikoji and Aburakawa, and soon gathered support of many former Nanbu retainers in the region. After pledging fealty to
Toyotomi Hideyoshi, he was confirmed as an independent warlord in 1590 and changed his name to "Tsugaru", formally establishing the
Tsugaru clan. Tsugaru Tamenobu assisted Hideyoshi at the
Battle of Odawara, and accompanied his retinue to
Hizen during the Korean Expedition. Afterwards, he sided with
Tokugawa Ieyasu during the
Battle of Sekigahara in 1600. Control of this region during the Sengoku period was more splintered than the central parts of Japan. Villagers were often forced to labor for the local rulers and feed soldiers. It was also more culturally diverse because of the Emishi-descendants and presence of the
Wajin and Ainu. By this time the transition from a hunter-gatherer society to subsistence farming was fairly complete. The people of this region grew rice, barley, wheat, and millet and fished.
Edo period , the
Edo period seat of the
Tsugaru clan|alt=Japanese castle with cherry blossoms During the
Edo period, , Japan was under the rule of the
Tokugawa shogunate and some 300 regional
daimyo, or feudal lords. The Edo period was a prolonged era of peace, stability, economic expansion, and urbanizaion. After the establishment of the
Tokugawa Shogunate, the Nanbu ruled the Shimokita Peninsula and the districts immediately to the south of it. The area to the west of the Nanbu's holdings and to the north of the lands held by the Akita clan were all controlled by the Tsugaru clan, from their capital at
Hirosaki. Work on
Hirosaki Castle was completed in 1611, replacing Horikoshi Castle as the Tsugaru clan's fortress. Mutsu Province was struck by the
Tenmei famine between 1781 and 1789, due to lower than usual temperatures that were exacerbated by volcanic eruptions at
Mount Iwaki, near the Tsugaru clan's capital, Hirosaki, between November 1782 and June 1783. At the beginning of the Edo period, the last pockets of Ainu people in Honshu still lived in the mountainous areas on the peninsulas of the prefecture. They interacted with the ruling clans to some extent, but they primarily lived off of fishing the waters of
Mutsu Bay and the
Tsugaru Strait. The Tsugaru clan made two big pushes to assimilate the Ainu; the first came in 1756 and the second came in 1809. Records show that the clan was successful in wiping out the Ainu culture in their holdings, though some geographic names in Aomori Prefecture still retain their original Ainu names. While there was still Ainu contact through trade and fishing, long-term Ainu settlement in Aomori Prefecture had essentially ended by the late Edo period (18th-19th centuries). The Ainu left behind many artifacts and some place and nature-related words are of Ainu origin, such as
Hiranai. Most people during this time lived in villages or on farms. These communities were small and tight-knit with people relying on mutual support. During this time, education become much more common all over Japan, including for commoners. This included Aomori Prefecture, though at a slower rate due to the remoteness, rural nature, and harsh winters.
Meiji Restoration to World War II The
Meiji Restoration in 1868 restored imperial rule to Japan, with
Emperor Meiji assuming the throne. Despite the 1867 resignation of the last shogun,
Tokugawa Yoshinobu, the
Boshin War had reached northern Japan by late 1868. On September 20, 1868 the pro-Shōgunate
Ōuetsu Reppan Dōmei was proclaimed at
Morioka, the capital of the Nanbu clan who ruled
Morioka Domain. The Tsugaru clan first sided with the pro-imperial forces of
Satchō Alliance, and attacked nearby
Shōnai Domain. The Tsugaru soon switched course, and briefly became a member of the Ōuetsu Reppan Dōmei. For reasons unclear, the Tsugaru backed out of the alliance and re-joined the imperial cause after a few months. The Nanbu and Tsugaru clans resumed their old rivalry and fought at the
Battle of Noheji. As a result, the entire clan was able to evade the punitive measures taken by the
Meiji government on other northern domains. In 1868, Mutsu Province was broken up into five provinces in the aftermath of the Boshin War, with a new province,
Rikuō, occupying what would later become Aomori Prefecture and the northwestern corner of Iwate Prefecture. It became a town in 1889 and then a city in 1898. The
Nippon Railway, a private company, completed the
Tōhoku Main Line in 1891, linking Aomori to
Ueno Station in
Tokyo. Despite problems with harsh winters and little previous urban development, this accomplishment was crucial to the rapid population and economic development of the prefecture after the Meiji Restoration. On October 30, 1889, an American merchant ship,
Cheseborough, was wrecked off the prefecture's west coast near the village
Shariki; many of the ship's crew were saved by the villagers. During a military exercise on January 23, 1902, 199 soldiers died after getting lost during a blizzard in the
Hakkōda Mountains disaster. On May 3, 1910, a fire broke out in the . Fanned by strong winds, the fire quickly devastated the whole city. The conflagration claimed 26 lives and injured a further 160 residents. It destroyed 5,246 houses and burnt 19 storage sheds and 157 warehouses.
Sabishiro Beach,
Misawa was the departure point for
Clyde Pangborn and Hugh Herndon when they began the first successful nonstop trans-Pacific flight on October 4, 1931. They landed in
East Wenatchee, Washington a little over 41 hours later. Throughout much of
World War II, the conflict remained distant for the people of Aomori Prefecture. Its ports and railways served to connect Hokkaido to the rest of Japan, chiefly bringing coal from the north to production sites in Japan's more populous areas. This connectivity became a strategic target for the American forces as the war neared its conclusion. American
carrier-based aircraft attacked Aomori Prefecture on July 14, 1945, destroying infrastructure across the prefecture, including the
Seikan Ferry, naval facilities in Mutsu and Misawa,
Hachinohe Airfield, and the ports and railways of Aomori and Hachinohe. At 10:30 p.m. on July 28, 1945, a group of 61 American
B-29 bombers
bombed the city of Aomori. Despite prior warnings, the estimated civilian impact of the air raid on the city was significant,
Misawa Air Base was occupied and rebuilt by the
United States Army Air Forces; since then the base has been shared by the Japanese military and the US military. The occupation government began an extensive Land Reclamation Policy (LRP) in 1946 aimed at reintegrating the seven million repatriates from Japan's former Asian colonies. This resulted in 269 new villages and 29,612 households on approximately of land in Aomori Prefecture. tracks|alt=Train tracks entering mountain tunnel In March 1985, after 23 years of labor and a financial investment of 690 billion yen, the
Seikan Tunnel finally linked the islands of
Honshū and
Hokkaido, thereby becoming the longest tunnel of its kind in the world. Almost exactly three years later, on March 13, railroad service was inaugurated on the
Tsugaru Kaikyo Line. The tunnel's opening to rail traffic saw the end of the Seikan Ferry rail service. During their 80 years of service, the Seikan rail ferries sailed between Aomori City and
Hakodate some 720,000 times, carrying 160 million passengers. Ferry service continues to operate between the cities, ferrying automobile traffic and passengers rather than trains. On June 2, 2007, four
North Korean defectors reached Aomori Prefecture, after having been at sea for six days, marking the second known case ever where North Korean defectors have successfully reached Japan by boat. This was a family of four who were picked up by the
Japan Coast Guard and taken to the port of
Fukaura. They were eventually flown to
Incheon International Airport in
South Korea at their own request. On March 11, 2011, a
magnitude 9.0 earthquake struck the east coast of Japan. The southeastern coast of Aomori Prefecture was affected by the resulting
tsunami: three people died and one was missing. Buildings along harbors were damaged, with boats thrown about in the streets. Disruptions as result of the earthquake to road and rail networks were widespread throughout the prefecture in the days following the earthquake. The
Tōhoku Shinkansen rail line was significantly damaged, cutting connectivity from the prefecture to points south along the line until full service was restored in late September. During the first week of January 2025, a record setting disaster-level snowfall hit Aomori Prefecture, with snow depths as much as .
Sōichirō Miyashita, the provincial governor, called this snowfall a "disaster" and invoked the
Disaster Relief Act, the first time the prefecture had done so in 13 years. At least 4 people died as a result of the snowfall. This snowfall did massive damage to the prefecture's important apple harvest, causing an estimated ¥10 billion (US$64.8 million) in damage to the crop. == Geography ==