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17 LAND CONDITIONS AND LAND USE IN THE TAMA HILL AREA, TOKYO - AN APPLICATION OF THE DIGITAL NATIONAL LAND INFORMATION SYSTEM Akio Bitoh Institute of Geoscience， 的iversity ofTsuku切， ~αpαn The Digital National Land Information System was set up in 1974 by the Geographical Survey Institute, MinisbγofConstruction. The Digital National Land Information System consists of regional information, such as land conditions, land use, basic infrastructures, statutory regulations and land value. These data are stored in figures and in symbols on magnetic tapes for computer calculations. In the present study, information on land conditions and land use in the Digital National Land Information System are mainly used. Quantitative analyses were made using the Digital National Land Information data to investigate the regional characteristics of land use in the Tama Hill area. In addition this is an attempt to clarify the changes in land use patterns in the hilly areas, which are located relatively close to the centre of big cities. TheTama Hill area covers an area between the Musashino and Sagamihara Plateaus in Tokyo and Kanagawa Prefecture. The northwestern Tama Hill, approximately 200 metres above sea level,has numerous narrow valleys,while the western Tama Hill,which is 70 metres above sea level,includes a few wide valleys. Until the late 1950s, the valleys ofthe Tama Hill were used exclusively for traditional chestnut, persimmon, vegetable, and rice farming. With the establishment oft 出】 heYur 站aoka Housing Complex in 1959 by the Japan Housing Development Corporation, however, Tama Hill became a residential area for commuters to Tokyo and Yokohama. Since 1960, change has been accelerated by a variety ofgovemmental and private projects. In the southwestern Tama Hill area, the Kohoku New Town was constructed by the Yokohama Municipal Govemment and the Housing and Urban Development Corporation. In the centralTama Hill area at Kawasaki and Yokohama, the Tokyo Tama De'en Toshi was established by the Tokyu Corporation. In the northwestem Tama Hill area, the Tama New Town was developed by the Tokyo Municipal Government, the Housing and Urban Development Corporation, and the Tokyo Metropolitan Housing Supply Corporation. Today,Tama Hill constitutes a mammoth residential district for the Tokyo metropolitan area. In general, land use in hilly areas is very complicated because of the difficulties in water control and the lack of flat ground. Uncontrolled urban development, therefore, has produced a complicated mosaic of the urban and 17 LAND CONDITIONS AND LAND USE IN THE TAMA HILL AREA, TOKYO - AN APPLICATION OF THE DIGITAL NATIONAL LAND INFORMATION SYSTEM Akio Bitoh Institute of Geoscience, University ofTsukuba, Japan The Digital National Land Information System was set up in 1974 by the Geographical Survey Institute, Ministry ofConstruction. The Digital National Land Information System consists of regional information, such as land conditions, land use, basic infrastructures, statutory regulations and land value. These data are stored in figures and in symbols on magnetic tapes for computer calculations. In the present study, information on land conditions and land use in the Digital National Land Information System are mainly used. Quantitative analyses were made using the Digital National Land Information data to investigate the regional characteristics of land use in the Tama Hill area. In addition this is an attempt to clarify the changes in land use patterns in the hilly areas, which are located relatively close to the centre of big cities. The Tama Hill area covers an area between the Musashino and Sagamihara Plateaus in Tokyo and Kanagawa Prefecture. The northwestern Tama Hill, approximately 200 metres above sea level, has numerous narrow valleys, while the western Tama Hill, which is 70 metres above sea level, includes a few wide valleys. Until the late 1950s, the valleys ofthe Tama Hill were used exclusively for traditional chestnut, persimmon, vegetable, and rice farming. With the establishment ofthe Yurigaoka Housing Complex in 1959 by the Japan Housing Development Corporation, however, Tama Hill became a residential area for commuters to Tokyo and Yokohama. Since 1960, change has been accelerated by a variety ofgovernmental and private projects. In the southwestern Tama Hill area, the Kohoku New Town was constructed by the Yokohama Municipal Government and the Housing and Urban Development Corporation. In the centralTama Hill area at Kawasaki and Yokohama, the Tokyo Tama De'en Toshi was established by the Tokyu Corporation. In the northwestern Tama Hill area, the Tama New Town was developed by the Tokyo Municipal Government, the Housing and Urban Development Corporation, and the Tokyo Metropolitan Housing Supply Corporation. Today, Tama Hill constitutes a mammoth residential district for the Tokyo metropolitan...

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