What a colorful view it is!! In this week, we japanese say as "Golden week" because we can enjoy holidays from the end of April to the 5th, May. Many people come here to see the large field of Iceland poppy (300 thousand flowers!).
The following has been cited from wikipedia. http://en.wikipedia.org/wiki/Papaver_nudicaule. The Iceland Poppy is a boreal flowering plant. Native to subpolar regions of northern Europe and North America, Iceland poppies are hardy but short-lived perennials, often grown as biennials, that yield large, papery, bowl-shaped, lightly fragrant flowers supported by hairy, one foot, curved stems among feathery blue-green foliage 1-6 inches long. All parts of this plant are likely to be poisonous,containing (like all poppies) toxic alkaloids.
Tama area is the name of the western part of Tokyo Metropolis. It consists of 26 cities, 3 towns and a village. A lot of people (about 4 milion) live in a eastern half part of the area. However, there are many mountains in the western part of Tama area, and there are very little flat land. Many hiking spots are in the western area, so you can enjoy walking on the trail, camping, and so on. If you see the beautiful mountain scene, you may not believe this is also in Tokyo.