Study on conformity of Facade Conservation and Interior Space Improvement in Traditional Houses

立面保护本身是传统民居保护的有效手段之一，但从改善室内空间的角度出发，指出了一些问题。本研究旨在通过对历史建筑群重点保护区（以下简称IPD）的各种保护案例的研究，抓住立面保护中的问题，如修复过程的过程性不足和内部空间改善引起的立面变形。为了掌握IPD中的问题，我进行了两种初步研究。第一年，我对IPD值班人员进行了问卷调查，以了解辖区传统房屋保护工程执行中的问题。此外，我亦搜集和分析了《加强规例》，结果发现有3点。第一，IPD的特征与建筑形式规则的类型有相关性。第二，“框架”（屋檐高度、屋顶斜度）、“轮廓”（建筑线）和“部分”（墙体）受和谐设计顺序的影响。第二年，以长野县的奈良IPD为例，研究了建筑改造的制度化与城市景观变化之间的关系。我比较了在指定为保护区之前和之后的重要变化。然后我证实了系统化给历史城镇景观带来了变化。从本质上讲，历史城镇景观的价值在于该地区本身。这种系统化可能造成“伪历史景观”的危险，也可能使地方历史街区失去地方特色。

Indeed Facade Conservation itself is one of the most effective tools in conservation of traditional houses, but the some issues have been pointed out from the viewpoint of interior space improvement. This study aims to seize the issues on the facade conservation such as process adequacies of restoration process and transfiguration of facade caused by interior space improvement through the study of various conservation cases in the Important Preservation Districts for the Groups of Historic Buildings (IPD for short). I made two types of preliminary studies for the grasp of the issues in IPD.In the first year, I carried out the a questionnaire survey for the duty officers of the IPDs in order to pint out the issues about the execution of preservation works of traditional houses in the districts. Also, I collected and analyzed the Enhancement Regulation".As a result, I found three points. First, there is correlation between character of IPD and building form regulation's type. Second, "frame" (height of eaves, pitch of roof), and "sihouette" (building line), and "parts" (walling) are influenced by the harmonious deign order. Third, the preservation deign development are influenced by "elements".In the second year, I researched to investigate relationship between the institutional systematization of the architectural reconstruction and the change in townscape, exampling Nara IPD located in Nagano Prefecture as a case study. I compared important changes in the periods before and after specified as the conservation district. And then I confirmed that systematization brought changes to the historic townscape. Essentially, the value of historic townscape resides in the district itself. The systematization might cause the danger to create "pseudo-historical towinscape2, and might lose local character in local historic district.