Utilization of the Deep Underground Space in Tokyo

2001年，《深层地下利用法》在日本生效。法律规定，使用地下一定深度的空间并不侵犯私人土地所有权。为了提供东京的城市减灾和减轻环境负担，技术规划应适用于东京。本研究员专注于深地下空间作为大城市东京最后宝贵的未使用空间。为了推进东京都的城市更新，我们提出了在东京湾的封闭区域开发深层地下空间网络的有效方法。我们的研究小组一直在进行与深层地下空间利用相关的项目。自1970年代以来，我们提出了几个项目，并审查了它们的有效性。本文介绍了最新的一项旨在有效利用地下深部资源的研究计划。还讨论了如何有效执行该项目。这些工程都是重大的公共工程，需要得到更高的预算优先权，因此，制定新的公共工程计划非常重要。本研究也针对可行性研究的结果，说明如何将都市防灾与都市环境改善结合起来，以实现此计画。

In 2001, the law concerning Deep Subterranean Utilization went into effect in Japan. The law states that the use of space at a certain depth underground does not violate the right of the private above-land ownership. In order to provide for urban disaster mitigation in Tokyo and lessen the environmental burden, technological planning should be applied to Tokyo. This researcher focuses on deep underground space as the last precious unused space of the mega city, Tokyo. We present an effective way of developing a deep underground space network in a closed-off section of Tokyo Bay to promote urban renewal in Tokyo.Our research group has been working on projects related to the utilization of deep underground spaces. We have proposed several projects since the 1970s and examined their effectiveness. An outline of the latest project that aims at effective utilization of deep underground is presenter in this research. The way effective implementation of the project can be achieved is also discussed. These projects are major public- works and need to receive higher budget priority Accordingly, it is very important to work out new public- works schemes. This researcher also focuses on the results of feasibility studies and shows how the project can be realized by integrating urban disaster prevention with urban environment improvement.