In Iida-city of Nagano prefecture, Japan, there was the great fire in 1947. The destruction area was 60 ha. After that, the Iida city administration made the city re-construction plan. And various town re-adjustment projects had been done. In this plan, back boundary lines projects were imposed and aimed to make a walkway for refuge from a fire and first-aid fire fightings. These lines are narrow paths which link house backs, about 2 meter width. They are called “Rikaisen” and are now used as a public path for daily life. Because of narrow, a car cannot pass. Each house which sandwiched a boundary line set a path back each 1 meter. And it was made municipal roads with 2 meter width. This path plan was based on lessons and reflections from the vast fire. So, this study reported the history of “Rikaisen” construction process. The path construction had progressed slowly till 1960s. But in the middle of 1970s, simple road pavements were carried out at a time with an infrastructure building, such as sewage, electricity and gas supply. By simple pavements, local newspaper articles said, the city administration let clarify its own intention as a public walkway. And it has come to be the current scene from about 1980. For nearly 70 years after the fire, constructions and maintenances of them have been continued by the city administration so far, such as a breakthrough of end or an extension. One of factors that constructions had been continued for a long time included continuous requests from neighborhood community associations. In local newspapers, associations had demanded cleanness of the negative hygiene environment as a reason of requests, such as habitation of mosquito-larvae. It may be said that clearances of negative elements were a driving force to promote continuation of the city planning.
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