The purpose of this paper is to consider how to connect the memories in Tama Newtown that divided by the development. To connect this discontinuity, I carried out two exhibitions as a curator; one was about the process of development of Tama Newtown, and the other was about the history of Ochiai Hakusan Shrine that located in the central area of Tama Newtown. Through these exhibitions, it turned out to be significant to know the process of the development in detail and the experience of the people who faced the development.

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Tama New Town Development Plan based upon the natural topography that was proposed in 1965 and abandoned afterwards was examined in this study in terms of 1 relationship between structure of the natural topography and land use pattern, 2 allocation of open space, pedestrian ways and their networking system, and 3 several noted aspects of functional system to sustain the overall space organization in the developed area. A comparative study with the realized development plan, which required higher amount of landform transformation, revealed some significant contemporary meanings of the plan based upon the natural topography as follows. The most basic structure of the natural topography in hilly area represented by ridgelines and valley areas was applied to articulate numerous land use units in the developed area, to create a network of open spaces and pedestrian ways rich in experience of natural environment, and to function as a physical elements that realize an optimum organization of residential districts and other facilities. In this sense, the area would have been preserving substantial resources for the future restoration based on the infrastructure of natural environment.

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After the Great East Japan Earthquake in the Tohoku region and the explosion of the Fukushima Daiichi (first) Nuclear Power Plant in March 2011, the market of renewable energy in Japan rapidly expanded as the FIT (Feed-in Tariff) now covers a capacity of 56GW (2012.7-2014.3). Renewable energy was originally suited for community-based economies, but in fact, large companies own most renewable energy power plants in local areas, yet they have not contributed to activating the local economy; results lack in local benefits such as human resource hiring and money circulation. The community-based renewable energy movement was born in Europe and gradually spread throughout Japan. The objectives of this movement are activation of the local community and achievement of autonomy through renewable energy. This paper introduces one such community-based renewable energy project, located in Tama, a suburb of Tokyo. It considers the possibility of building social capital through characteristic projects, such as a citizen fund, driving the public with two different organizations, and youth training programs related to renewable energy.

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は、日本最大面積規模の新住宅市街地開発事業（2225.6ha）であり、1965年12月から東京都等により開発された。当初基盤整備は新住宅市街地開発事業のみで行なわれる予定であったが、その後、既存住民の反対等により666.5haが土地区画整理事業に変更された。本研究は、土地区画整理事業に変更された区域に着目し、その変更プロセスと要因を、住民、施行者、関係市町村の行動より明らかにする。また、それら区域の施行前の特徴を地形、人口密度、鉄道・道路計画配置から、施行後の特徴を減歩率、土地利用割合から明らかにする。

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新住宅市街地開発事業と土地区画整理事業を併用して実現された開発では，鉄道，道路，河川など骨格となる都市施設の一体的な整備が重要な課題であった．通常，開発事業者は開発区域内の整備のみを行うが，開発では，ニュータウン全体の整備促進のため開発事業者が骨格となる広域的な都市施設整備費の一部を負担している．本研究では，どのような考え方で整備が進められたのかについて，事業者と自治体などの間で結ばれた覚書や協定書から明らかにし，その結果どの程度の開発者負担が生じたのか，また実際の事業に期間はどの程度かかり，他の多摩地域と比較して事業進捗に差が生じたのか，そして最後に開発事業者の負担が可能となった背景は何か，について明らかにした．

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多摩丘陵で発見された絶滅危惧種タマノホシザクラの分布と（以下NT）開発との関連性を明らかにするために，本種の分布調査を行なった．これまで本種は約100個体が生育すると考えられていたが，八王子市と町田市に多摩市を加えた3市の27個所に177個体が生育していることが明らかになった．うち81.9％がNT区域内に，17.5％が隣接する町田市の片所谷戸の二次林に生育し，NT区域における本種の生育地は全て東京都施行区域であったが，現在の管理者は異なっていた．胸高直径（DBH）と年輪解析をもとに推定した樹齢とNT開発年代の関係をみると，生育地の開発が行われた1980年代には，最も大きなサイズの個体でさえ幼苗か若齢木であったことが示唆された．また，公園管理者の資料には一部の個体がヤマザクラとして記載され，現在も同名の樹名板もつけられていたこと，そして東京都のNT開発資料から，自生地と推察される片所谷戸のような二次林からヤマザクラの稚樹が移植された可能性が高いと考えられた．以上のことから，現在のタマノホシザクラの分布は，自生地が僅かに残っている一方，東京都によるNT開発の際の人為的な植栽が強い要因として働いていると結論づけられた．本種のいくつかの個体群は10年間で消滅していたが，片所谷戸では，近年のボランティアによる二次林管理の再開によって萌芽個体数は増加していたため，タマノホシザクラの個体群の保全と持続可能な利用を維持するには，周期的な伐採や下草刈りなどの二次林の管理を，個体群の生育状況に合わせて適切に行うことが重要であると考えられる．

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The purpose of this study is to identify the process of transition and its factors that influenced practical process through which the idea and concepts of "Tama New Town Development Plan Based on The Natural Topography in 1965" was realized in the area II of the residential district No.7 in the new town by primarily examining descriptions in the documents prepared for the design development. Having the original ideas expressed in the natural topography plan for a benchmark, contents of six steps of design development were analyzed in terms of changes in functional space allocation, land formation and the spatial system that was supposed to support the natural topography plan. It revealed some factors that were negatively influential to maintaining the original concept and ideas of the natural topography plan. As a result, it is speculated that the planning and design of urban infrastructures conducted separately from those of architecture for residential environment and vice versa in practical process of project realization was critical factors for distortions of the concepts.

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