Megalopolis in the context of "Pearl River Delta"

Honshu (Japanese: 本州, Hepburn: Honshū; pronounced [hoꜜɰ̃.ɕɯː] ; lit. 'main province'), historically known as Akitsushima (秋津島; lit. 'dragonfly island'), is the largest of Japan's four main islands. It lies between the Pacific Ocean (east) and the Sea of Japan (west). It is the seventh-largest island in the world, and the second-most populous after the Indonesian island of Java.

Honshu had a population of 104 million as of 2017, constituting 81.3% of the entire population of Japan, and mostly concentrated in the coastal areas and plains. Approximately 30% of the total population resides in the Greater Tokyo Area on the Kantō Plain. As the historical center of Japanese cultural and political power, the island includes several past Japanese capitals, including Kyoto, Nara, and Kamakura. Much of the island's southern shore forms part of the Taiheiyō Belt, a megalopolis that spans several of the Japanese islands. Honshu also contains Japan's highest mountain, Mount Fuji, and its largest lake, Lake Biwa.

41°N 74°W / 41°N 74°W / 41; -74

The Northeast megalopolis, also known as the Northeast Corridor, Acela Corridor, Boston–Washington corridor, BosWash, Bos–Wash corridor or BosNYWash, is the most populous megalopolis exclusively within the United States, with slightly over 53 million residents as of 2024. The nickname "BosWash" for the region was first used by futurist Herman Kahn in a 1967 essay. It is the world's largest megalopolis by economic output.

The Randstad (Dutch pronunciation: [ˈrɑntstɑt] ; "Rim City" or "Edge City") is a roughly crescent- or arc-shaped conurbation in the Netherlands, that includes almost half the country's population. With a central-western location, it connects and comprises the Netherlands' four biggest cities (Amsterdam, Rotterdam, The Hague, and Utrecht), their suburbs, and many towns in between, that all grew and merged into each other. Among other things, it includes the Port of Rotterdam (the world's busiest seaport outside Asia), the Port of Amsterdam (Europe's fourth-busiest seaport), and Amsterdam Airport Schiphol (Europe's fourth-busiest airport). With a population of approximately 8.4 million people it is one of the largest metropolitan regions in Europe, comparable in population size to the Rhine-Ruhr metropolitan region or the San Francisco Bay Area, and covers an area of approximately 11,372 km (4,391 sq mi). The Randstad had a gross regional domestic product of €510 billion in 2022, making it the second most productive region in the European Union, only behind the Paris metropolitan area. It encompasses both the Amsterdam metropolitan area and Rotterdam–The Hague metropolitan area. It is part of the larger Blue Banana megalopolis.

The Randstad's main cities are Almere, Amsterdam, Delft, Dordrecht, Haarlem, The Hague, Leiden, Rotterdam, and Utrecht. Other cities and towns include Alkmaar, Alphen aan den Rijn, Amersfoort, Amstelveen, Capelle aan den IJssel, Gouda, Heerhugowaard, Hilversum, Hoofddorp, Hoorn, Lelystad, Nieuwegein, Purmerend, Rijswijk, Schiedam, Spijkenisse, Vlaardingen, Zaandam, Zeist, and Zoetermeer.

São Paulo (/ˌsaʊ ˈpaʊloʊ/; Portuguese: [sɐ̃w ˈpawlu] ; Portuguese for 'Saint Paul') is the capital city of the state of São Paulo, as well as the most populous city in Brazil and in the Americas. Listed by the Globalization and World Cities Research Network (GaWC) as an alpha global city, it exerts substantial international influence in commerce, finance, arts, and entertainment. It is the largest urban area by population outside Asia and the most populous Portuguese-speaking city in the world. The city's name honors Paul the Apostle and people from the city are known as paulistanos. The city's Latin motto is Non ducor, duco, which translates as "I am not led, I lead".

Founded in 1554 by Jesuit priests, the city was the center of the bandeirantes settlers during Colonial Brazil, but it became a relevant economic force only during the Brazilian coffee cycle in the mid-19th century and later consolidated its role as the main national economic hub with industrialization in Brazil in the 20th century, which made the city a cosmopolitan melting pot, home to the largest Arab, Italian, and Japanese diasporas in the world, with ethnic neighborhoods like Bixiga, Bom Retiro, and Liberdade, and people from more than 200 other countries. The city's metropolitan area, Greater São Paulo, is home to more than 20 million inhabitants and ranks as the most populous in Brazil and one of the most populous in the world. The process of conurbation between the metropolitan areas around Greater São Paulo also created the São Paulo Macrometropolis, the first megalopolis in the Southern Hemisphere, with more than 30 million inhabitants.

The Yangtze Delta or Yangtze River Delta (YRD), once known as the Shanghai Economic Zone, is a megalopolis generally comprising most parts of Shanghai, southern Jiangsu, northern Zhejiang, and southern Anhui. The area lies in the heart of the Jiangnan region (literally meaning "south of the Yangtze"), where the Yangtze drains into the East China Sea. Historically, the fertile delta fed much of China's population, allowing cities and commerce to flourish. Today, it is one of China's most important metropolitan areas and is home to China's financial center, as well being as a tourist destination and a hub for manufacturing ranging from textile to automaking. In 2024, the Yangtze Delta had a GDP of approximately US$4.7 trillion (about the same size as Germany).

The urban buildup in the area has given rise to what may be the largest concentration of adjacent metropolitan areas in the world. It covers 350,000 km (140,000 sq mi) and is home to over 240 million people, about a sixth of China's population. With a fourth of the country's GDP, the YRD is one of the fastest growing and richest regions in East Asia.

Suzhou is a major prefecture-level city in southern Jiangsu province, China. It is part of the Yangtze Delta megalopolis.

Founded in 514 BC, Suzhou rapidly grew in size by the Eastern Han dynasty, mostly due to emigration from northern China. From the 10th century onwards, it has been an important economic, cultural, and commercial center, as well as the largest non-capital city in the world, until it was overtaken by Shanghai in approximately 1850. Since economic reforms began in 1978, Suzhou attained GDP growth rates of about 14% in 35 years. In 2023, Suzhou had 5 million registered residents. Suzhou is listed as the # 33 cities by scientific output according to the Nature Index 2025. The city is home to universities, including Soochow University, Suzhou University of Science and Technology, Xi'an Jiaotong–Liverpool University, and Changshu Institute of Technology.

The Jakarta metropolitan area or Greater Jakarta, known locally as Jabodetabek (acronym of Jakarta–Bogor–Depok–Tangerang–Bekasi), or less commonly as Jabodetabekpunjur which includes Puncak region of Bogor Regency and portions of Cianjur Regency, is the most populous megapolitan area in Indonesia. It includes the national capital (Jakarta Special Capital Region, as the core city) as well as five satellite cities and three complete regencies.

The original term "Jabotabek" dated from the late 1970s and was revised to "Jabodetabek" in 1999 when "De" (for "Depok") was inserted into the name following its formation. The term "Jabodetabekjur" or "Jabodetabekpunjur" was legalised on the Presidential Regulation Number 54 of 2008, and then the name "Jabodetabekpunjur" became officially used; however, this extension to include part of Cianjur Regency is not included in the figures below.

The São Paulo Macrometropolis (Portuguese: Macrometrópole de São Paulo) or São Paulo Megalopolis (Portuguese: Megalópole de São Paulo), also known as Expanded Metropolitan Complex (Portuguese: Complexo Metropolitano Expandido), is a Brazilian megalopolis that emerged through the existing process of conurbation between the metropolitan areas located around the Greater São Paulo, with more than 30 million inhabitants, or 74 percent of São Paulo State's population, and is one of the most populous urban agglomerations in the world.

Beyond the Greater São Paulo, the megalopolis encompasses the metropolitan areas of Campinas, Baixada Santista, Sorocaba, Vale do Paraíba e Litoral Norte, Jundiaí and Piracicaba. The total population of these areas added to the state capital exceeds 31.5 million inhabitants, or about 75% of the population of the entire state of São Paulo.