Tokyo has enacted a measure to cut greenhouse gases. Governor Shintaro Ishihara created Japan's

Tokyo has enacted a measure to cut greenhouse gases. Governor Shintaro Ishihara created Japan's first emissions cap system, aiming to reduce greenhouse gas emission by a total of 25% by 2020 from the 2000 level.[55] Tokyo is an example of an urban heat island, and the phenomenon is especially serious in its special wards.[47][56] According to the Tokyo Metropolitan Government,[57] the annual mean temperature has increased by about 3 °C (5.4 °F) over the past 100 years. Tokyo has been cited as a "convincing example of the relationship between urban growth and climate."[58]
In 2006, Tokyo enacted the "10 Year Project for Green Tokyo" to be realised by 2016. It set a goal of increasing roadside trees in Tokyo to 1 million (from 480,000), and adding 1,000 ha of green space 88 of which will be a new park named "Umi no Mori" (sea forest) which will be located on a reclaimed island in Tokyo Bay which used to be a landfill.[59] From 2007 to 2010 436 ha of the planned 1,000 ha of green space was created and 220,000 trees were planted bringing the total to 700,000. By 2014 road side trees in Tokyo will increase to 950,000 and a further 300 ha of green space will be added.[60]
Demographics[edit source | editbeta]


As of October 2007, the official intercensal estimate showed 12.79 million people in Tokyo with 8.653 million living within Tokyo's 23 wards.[2] During the daytime, the population swells by over 2.5 million as workers and students commute from adjacent areas. This effect is even more pronounced in the three central wards of Chiyoda, Chuo, and Minato, whose collective population as of the 2005 National Census was 326,000 at night, but 2.4 million during the day.[2]
The entire prefecture had 12,790,000 residents in October 2007 (8,653,000 in 23 wards), with an increase of over 3 million in the day. Tokyo is at its highest population ever, while that of the 23 wards peak official count was 8,893,094 in the 1965 Census, with the count dipping below 8 million in the 1995 Census.[citation needed] People continue to move back into the core city as land prices have fallen dramatically.[citation needed]
As of 2005, the most common foreign nationalities found in Tokyo are Chinese (123,661), Korean (106,697), Filipino (31,077), American (18,848), British (7,696), Brazilian (5,300) and French (3,000).
The 1889 Census[citation needed] recorded 1,389,600 people in Tokyo City, Japan's largest city at the time