Aichi Prefecture in the context of "Gifu Prefecture"

The Chūbu region (中部地方, Chūbu-chihō), Central region, or Central Japan (中部日本, Chūbu-nihon) is a large and diverse region in the middle of Honshū, Japan's main island. In a wide, classical definition, it encompasses nine prefectures (ken): Aichi, Fukui, Gifu, Ishikawa, Nagano, Niigata, Shizuoka, Toyama, and Yamanashi.

It is located directly between the Kantō region and the Kansai region and includes the major city of Nagoya as well as Pacific Ocean and Sea of Japan coastlines, extensive mountain resorts, and Mount Fuji.

The Asian Games, also known as Asiad, is a continental multi-sport event held every four years for athletes of Asia. The Games were regulated by Asian Games Federation from the first Games in New Delhi, India in 1951, until the 1978 Games. Since the 1982 Games, they have been organized by the Olympic Council of Asia, after the breakup of the Asian Games Federation. The Games are recognized by the International Olympic Committee and are the second largest multi-sport event after the Olympic Games.

Nine nations have hosted the Asian Games. Forty-six nations have participated in the Games, including Israel, which was excluded from the Games after its last participation in 1974. The last edition of the Games was held in Hangzhou, China, from 23 September to 8 October 2023. The next edition will be held in Aichi Prefecture and Nagoya, Japan, from 19 September to 4 October 2026.

Nagano Prefecture (長野県, Nagano-ken; Japanese pronunciation: [naꜜɡano, naɡanoꜜkeɴ]) is a landlocked prefecture of Japan located in the Chūbu region of Honshu. It has a population of 2,007,682 as of 1 July 2023 and a geographic area of 13,561.56 square kilometres (5,236.15 sq mi). It borders Niigata Prefecture to the north, Gunma Prefecture to the northeast, Saitama Prefecture to the east, Yamanashi Prefecture to the southeast, Shizuoka Prefecture and Aichi Prefecture to the south, and Gifu Prefecture and Toyama Prefecture to the west.

Nagano is the prefecture's capital and largest city, with other major cities including Matsumoto, Ueda, and Iida. The prefecture is known for its impressive highland areas of the Japanese Alps, including most of the Hida Mountains, Kiso Mountains, and Akaishi Mountains, which extend into neighbouring prefectures; it contains nine of the twelve highest mountains in Japan. Its mountain ranges, natural scenery, and history have gained the prefecture international recognition as a winter sports tourist destination, and it received further attention as the host of the 1998 Winter Olympics. It is served by the Hokuriku Shinkansen railway line with direct services to Tokyo, Toyama, and Kanazawa.

Shizuoka Prefecture (静岡県, Shizuoka-ken; Japanese pronunciation: [ɕi.(d)zɯꜜ.o.ka, ɕi.(d)zɯ.o.kaꜜ.keɴ]) is a prefecture of Japan located in the Chūbu region of Honshu. As of September 2023, Shizuoka Prefecture has a population of 3,555,818 and has a geographic area of 7,777.42 km (3,002.88 sq mi). Shizuoka Prefecture borders Kanagawa Prefecture to the east, Yamanashi Prefecture to the northeast, Nagano Prefecture to the north, and Aichi Prefecture to the west.

Shizuoka is the capital and Hamamatsu is the largest city in Shizuoka Prefecture, with other major cities including Fuji, Numazu, and Iwata. Shizuoka Prefecture is located on Japan's Pacific Ocean coast and features Suruga Bay formed by the Izu Peninsula, and Lake Hamana which is considered to be one of Japan's largest lakes. Mount Fuji, the tallest volcano in Japan and cultural icon of the country, is partially located in Shizuoka Prefecture on the border with Yamanashi Prefecture. Shizuoka Prefecture has a significant motoring heritage as the founding location of Honda, Suzuki, and Yamaha, and is home to the Fuji International Speedway.

Nagoya (名古屋市, Nagoya-shi; [naꜜ.ɡo.ja, -ŋo.ja, na.ɡo.jaꜜ.ɕi, -ŋo.jaꜜ.ɕi] , locally [na.ɡo.ja, -ŋo.ja]) is the capital and most populous city of Aichi Prefecture in Japan. It is the largest city in the Chūbu region, the fourth-most populous city in Japan (with a 2025 population of 2.3 million), and the principal city of the Chūkyō metropolitan area, which is itself the third-most populous metropolitan area in Japan (with a population of 10.11 million). Nagoya is located on the Pacific coast in central Honshu, and its seaport is the largest in Japan.

In 1610, the shogun Tokugawa Ieyasu moved the capital of Owari Province from Kiyosu to Nagoya. This period saw the renovation of Nagoya Castle. The early 1900s brought a convergence of economic factors that fueled rapid growth in the city during the Meiji Restoration, and it became a major industrial hub for the country as the area's automobile, aviation, and shipbuilding industries flourished; the traditional manufacturing of bicycles, sewing machines, and timepieces was thus followed by the production of ceramic, chemicals, oil, petrochemicals, and steel. These factors made Nagoya a target of American air raids during the Pacific War.

Mie Prefecture (三重県, Mie-ken; Japanese pronunciation: [mʲiꜜ.e, mʲi.eꜜ.keɴ]) is a prefecture of Japan located in the Kansai region of Honshu. Mie Prefecture has a population of 1,781,948 (as of 1 June 2019) and has a geographic area of 5,774 square kilometers (2,229 sq mi). Mie Prefecture is bordered by Gifu Prefecture to the north, Shiga Prefecture and Kyoto Prefecture to the northwest, Nara Prefecture to the west, Wakayama Prefecture to the southwest, and Aichi Prefecture to the east.

Tsu is the capital and Yokkaichi is the largest city of Mie Prefecture, with other major cities including Suzuka, Matsusaka, Ise, and Kuwana. Mie Prefecture is located on the eastern coast of the Kii Peninsula, forming the western side of Ise Bay which features the mouths of the Kiso Three Rivers. Mie Prefecture is a popular tourism destination home to Nagashima Spa Land, Suzuka International Racing Course, and some of the oldest and holiest sites in Shinto, the traditional religion of Japan, including the Ise Grand Shrine and the Tsubaki Grand Shrine.

The Matsudaira clan (松平氏, Matsudaira-shi) was a Japanese samurai clan that descended from the Minamoto clan. It originated in and took its name from Matsudaira village, in Mikawa Province (modern-day Aichi Prefecture). During the Sengoku period, the chieftain of the main line of the Matsudaira clan, Matsudaira Motoyasu became a powerful regional daimyo under Oda Nobunaga and Toyotomi Hideyoshi and changed his name to Tokugawa Ieyasu. He subsequently seized power as the first shōgun of the Tokugawa shogunate which ruled Japan during the Edo period until the Meiji Restoration of 1868. Under the Tokugawa shogunate, many cadet branches of the clan retained the Matsudaira surname, and numerous new branches were formed in the decades after Ieyasu. Some of those branches were also of daimyō status.

After the Meiji Restoration and the abolition of the han system, the Tokugawa and Matsudaira clans became part of the new kazoku nobility.

The Nōbi Plain (濃尾平野, Nōbi Heiya) is a large plain in Japan that stretches from the Mino area of southwest Gifu Prefecture to the Owari area of northwest Aichi Prefecture and extreme northern Mie Prefecture, covering an area of approximately 1,800 square kilometres (695 sq mi). It is an alluvial plain created by the Kiso Three Rivers (the Ibi, Kiso and Nagara rivers) and has very fertile soil. It is bordered on the west by the Ibuki and Yōrō mountain ranges, and to the east by the Owari Hills. Its northern border is marked by the Ryōhaku Mountains and the south by Ise Bay.