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http://stats-japan.com/t/tdfk/tokyo
http://humstokyo.weebly.com/pull-factors-and-push-factors.html
http://www.sustainablebusinesstoolkit.com/sustainable-cities-the-tokyo-initiative/
http://www.indexmundi.com/japan/demographics_profile.html
http://www.japan-guide.com/e/e3021.html
http://worldpopulationreview.com/world-cities/tokyo-population/
http://www.metro.tokyo.jp/ENGLISH/ABOUT/HISTORY/history03.htm
http://www.newgeography.com/content/002923-the-evolving-urban-form-tokyo
http://www.sustainablebusinesstoolkit.com/sustainable-cities-the-tokyo-initiative/
http://www.lonelyplanet.com/japan/things-to-do/japan-s-best-traditional-and-modern-architecture
https://cofremantle.wordpress.com/2014/05/03/recycling-and-waste-to-energy-in-tokyo/
http://www.japantimes.co.jp/news/2008/02/26/reference/japan-needs-imports-to-keep-itself-fed/#.VX0knhOqqkp
http://www.waterworks.metro.tokyo.jp/eng/supply/
http://www.newgeography.com/content/002923-the-evolving-urban-form-tokyo
http://tokyogreenspace.com/
http://www.encyclopedia.com/topic/Tokyo.aspx
http://en.wikipedia.org/wiki/Greater_Tokyo_Area
http://www.expatarrivals.com/japan/tokyo/areas-and-suburbs-in-tokyo
http://stats-japan.com/t/tdfk/tokyo
http://humstokyo.weebly.com/pull-factors-and-push-factors.html
http://www.sustainablebusinesstoolkit.com/sustainable-cities-the-tokyo-initiative/
http://www.indexmundi.com/japan/demographics_profile.html
http://www.japan-guide.com/e/e3021.html
http://worldpopulationreview.com/world-cities/tokyo-population/
http://www.metro.tokyo.jp/ENGLISH/ABOUT/HISTORY/history03.htm
http://www.newgeography.com/content/002923-the-evolving-urban-form-tokyo
http://www.sustainablebusinesstoolkit.com/sustainable-cities-the-tokyo-initiative/
http://www.lonelyplanet.com/japan/things-to-do/japan-s-best-traditional-and-modern-architecture
https://cofremantle.wordpress.com/2014/05/03/recycling-and-waste-to-energy-in-tokyo/
http://www.japantimes.co.jp/news/2008/02/26/reference/japan-needs-imports-to-keep-itself-fed/#.VX0knhOqqkp
http://www.waterworks.metro.tokyo.jp/eng/supply/
http://www.newgeography.com/content/002923-the-evolving-urban-form-tokyo
http://tokyogreenspace.com/