Tokyo- Japan
 Tokyo officially Tokyo Metropolis is one of the
47 prefectures of Japan. It is located on the
eastern side of the main island Honshū and
includes the Izu Islands and Ogasawara Islands.
Tokyo Metropolis was formed in 1943 from the
merger of the former Tokyo Prefecture and
the city of Tokyo. Tokyo is the capital of Japan,
the center of the Greater Tokyo Area, and
the largest metropolitan area of Japan. It is the
seat of the Japanese government and
the Imperial Palace, and the home of
the Japanese Imperial Family.
 The Tokyo Metropolitan
government administers
the twenty-three special
wards of Tokyo, each
governed as a city, that
cover the area that was
the city of Tokyo as well as
39municipalities in the
western part of the
prefecture and the two
outlying island chains. The
population of the special
wards is over 8 million
people, with the total
population of the
prefecture exceeding 13
million.
New York - United States
 New York is the most
populous city in the United
States and the center of
the New York metropolitan
area, which is one of the most
populous metropolitan
areas in the world. New York
City has a significant impact
on global commerce, finance,
media, culture, art, fashion,
research, education, and
entertainment. As host of
the United Nations
Headquarters, it is also an
important center for
international affairs. The city
is often referred to as New
York City or the City of New
York, to distinguish it from
the state of New York, of
which it is a part.
 Located on a large natural harbor on the Atlantic
coast of the Northeastern United States, New York
City consists of five boroughs: The
Bronx, Brooklyn, Manhattan Queens, and Staten
Island. With a population of 8.4 million distributed
over a land area of just 305 square miles (790
km2),New York is the most densely populated major
city in the United States. As many as 800 languages
are spoken in New York, making it the most
linguistically diverse city in the world. The New York
metropolitan area's population is the United States'
largest, estimated at 19.1 million people distributed
over 6,720 square miles (17,400 km2). The New York
metropolitan area is also part of the most
populous combined statistical area in the United
States, containing 22.2 million people as of 2009
Census estimates.
Sao Paulo - Brazil
 São Paulo is the largest city in Brazil, the largest city in
the southern hemisphere, and the world's7th largest
metropolitan area. The city is the capital of the state of São
Paulo, the most populous Brazilian state. The name of the city
honors Saint Paul. São Paulo exerts strong regional influence in
commerce and finance as well as arts and entertainment. São
Paulo is considered an Alpha - World City.
 The city has many landmarks, such as the Paulista Museum, the
neo-gothic Metropolitan Sé Cathedral, the São Paulo Museum of
Art (MASP), the Monumento às Bandeiras (Monument to
the Bandeiras) and Niemeyer's Ibirapuera Bienal Complex; and
more recently the Octávio Frias de Oliveira Bridge (Estaiada
Bridge) in the South Side. Paulista Avenue, in Midtown, is the
city´s most important financial center.
 The city also lies at the center
of the heavily urbanized São
Paulo metropolitan area, with an
estimated 19,889,559 people in
2009 over 7,944 square
kilometers (3,067.2 sq mi), is the
largest metropolitan area in the
nation. São Paulo metropolitan
area is ranked as the second
most populous in the Americas.
 A famous nickname for the city
is "Sampa." São Paulo is also
known for its unreliable weather,
the size of its helicopter
fleet, architecture, gastronomy,
and multitude of sky scrapers.
Incheon- South Korea
 Incheon , officially the Incheon Metropolitan City, is
South Korea's third or fourth largest metropolis,
after Seoul and Busan, and tied with Daegu. As the
largest seaport on the west coast and home to the
country's largest airport, Incheon International
Airport, Incheon is South Korea's most important
transport hub. In the 21st century, Incheon has
transformed into a global business hub centered
around the high-tech and futuristic Songdo
International City, which is home to South Korea's
tallest building, the 305m super tall Northeast Asia
Trade Tower.
 Human settlement at the location
goes back to the Neolithic. In
modern times Incheon became
important because its location on
an estuary made it a good harbor;
when the port was founded in 1883,
the city, called Jemulpo at the
time had a population of only 4,700.
Incheon is now home to over
2.5 million people and under the
control of one of the two free
economic zone authorities in Korea,
aimed at attracting foreign
investment; the city aims to turn
itself into a financial and corporate
hub along with the BusanJinhae Free Economic Zone
Authority.
Mexico City- Mexico
 Mexico City is the Federal District capital of
the Mexico and seat of the federal powers of the
Mexican Union. It is also the largest city in Mexico as
well as the second largest city in the Americas and
the world's third largest metropolitan area by
population, after Seoul and Tokyo. It is a federal
entity within Mexico which is not part of any one of
the 31 Mexican states but belongs to
the federation as a whole. Mexico City is the most
important political, cultural, and financial center in the
country.
 Mexico City is one of the most important financial
centers in North America which is located in
the Valley of Mexico, a large valley in the high
plateaus at the center of Mexico, at an altitude of
2,240 meters (7,350 ft). The city consists of
sixteen boroughs.
 The 2009 estimated population for the city proper
was around 8.84 million people, and has a land area of
1,485 square kilometers (573 sq mi). According to the
most recent definition agreed upon by the federal and
state governments, the Mexico City metropolitan
area population is 21.2 million people, making it
the largest metropolitan area in the Americas and
the fifth largest agglomeration in the world.