・Achievement and Prospect of Project

This project study aimed to establish a technology system of refining architecture* mostly of public housing and obtained effective results through the supervision of the residential building renovation project of Tokyo Metropolitan Housing Supply Corporation.
Although the renovation of public complexes should be made together with wide and urbane area renovation, actual construction work was conducted only for the residential buildings and the wide area renovation was limited to works such as surveys and proposals. In future, it would be important to establish and implement a method of refining housing complexes with extensive partnership.
The study therefore aimed to establish a method of not only public complex refining, but also wide urban refining and conducted many surveys and proposals on the cities in Japan and foreign countries to accumulate data.
*The refining architecture is a building renovation technology that allows, unlike conventional extension or reconstruction method, a drastic design change, usage change, and antiseismic reinforcement while keeping major portions of old buildings.

・Details of research achievement

1．Survey and study of refining method of entire public complex

In the high economic growth period, many housing complexes were built. They now have various problems such as aging of the buildings and facilities, barrier free environment, and diversification of life styles. In the study in FY2010, we actually lived in an apartment of Kurume-nishi housing complex in Tokyo for about a week to conduct questionnaire and hearing surveys. Based on the survey and analysis results, we identified the current problems and potentials of the suburban housing complex. We showed that a large housing complex in a suburban area could be renewed as a core of local city planning by developing an independent housing complex together with industry that took advantage of the local context and with mobility. The obtained result s were published in a book "Refining Housing Complexes" in 2011.

2．Survey and study of the refining method of each building of a public housing complex

In the study from FY2011 to FY2013, we made an agreement on a joint research with Tokyo Metropolitan Housing Supply Corporation and supervised a model project for refining Building 8 of Chitose Karasuyama Housing Complex owned by the Corporation. We recorded, analyzed and verified the basic plan, basic design, execution design, and construction processes using the refining construction method for refining work of each building. We then organized the results into a model to reuse old buildings as building stocks that could meet changes of the life stages and lifestyles from child-raising age to old age without destroying the residential areas where the room layout or facility levels no longer met the current needs of the residents, and developed a model method of refining existing stocks. There have been many studies on the methods of housing complex renovation. The present study is quite advanced as it was developed based on actual business-based projects.
We conducted the following surveys, analyses and examinations.

These results were summarized in a final report "Refining Project of Karasuyama Housing Complex."

3．Proposal on refining of each dwelling unit of a housing complex

In Tama New Town housing complexes, in particular the public housing that was built in the early stage, aging of their facilities is becoming a serious problem. In this study we examined Tokyo Metropolitan owned Suwa housing complex in Nagayama, created a steplike renovation plan mostly for the facilities using water, and proposed a method of rapid renovation of the residential environment. In the proposal we aimed at a realistic cost and construction period by developing a renovation unit for water facilities together with facilities manufacturers.

4．集合住宅の課題抽出と解決手法の提案

Problems of aging and depopulation of housing complexes were analyzed and their solutions were proposed based on seven keywords. The results were published in a book "Refining Architecture for Apartment Dwellers " in 2013 to promote understanding of our achievement among not only experts but also ordinary people.

5．Proposal on refining of existing cities

(i) In the study in FY2011 we conducted an on-site survey and analysis on deserted shopping streets of suburban cities (Saga in Saga Prefecture, Kurume in Fukuoka Prefecture, and Nagoya in Aichi Prefecture) with the aim of proposing renovation plans. Based on the survey results, we proposed the development of a new smart city from the existing cities by integrating the state-of-the-art smart technologies and urban reorganization proposals and published the proposal in a book "Refining City × Smart City" in 2012.
(ii) Ulaanbaatar in Mongolia has various problems as the existing city structure cannot follow the rapid lifestyle modernization due to the globalization. In the study in FY2012, we analyzed the current problems through the survey of the existing infrastructure of Ulaanbaatar and proposed improvement measures. We also made a proposal on the wide city collaboration where the new city development and the new airport development were jointly conducted.
The results were published in "Refining City in Mongolia" in 2013.

6．Proposal on refining of public architecture

To realize reorganization and recovery of public buildings, we analyzed the current condition of them and proposed a case study. The proposal, together with the renewal cases of public buildings that we had worked on, was published in a book "The future of Public buildings Refining lead " in 2013.