川口 将武

<p>In this study, we will understand the actual situation of street trees maintenance management systems in local governments in Japan and the development status of street trees maintenance management plans and management guidelines. Next, this study was to understand the current state of the street trees maintenance management system and its impact, and to investigate the problems of citizen's participation in street trees maintenance management. As a result, street trees maintenance work is mainly done in the civil engineering road sector. In large local governments, staff specializes in landscaping, while in small local governments, it's mainly civil engineering. In addition, most street trees management methods are outsourced by contractors, with less than half direct management by staff. The policy to maintain street trees is positioned in many local government green master plans. Since 2015, local governments have developed conservation plans for street trees and are working on sound conservation. Since the 2000s, local governments have been working on maintenance management systems with the participation of residents. Most of them are road beautification activities based on adaptive systems. In the future, the challenge will be to further expand the system and raise citizen's interest and value perception.</p>

<p>This study aims to discuss the psychological process how the evaluation and perception of residential area or neighborhood parks were connected with the formation of attachment to residential area through neighborhood parks. Concretely, the structural equation modeling was conducted based on the results of questionnaire surveys for the residents in new town. In addition, this study targeted two areas with different resident's activities, "Suzaku area" and "Sakyo area" in new town where the site of "Basic Parks for Community Use" is planned because the relationship between "evaluation and perception of residential area or neighborhood parks" and "attachment to residential area" is discussed limited to the park. As a result, the following findings were obtained; 1) in both areas, "attachment to residential area" is influenced "attachment to neighborhood parks." And, the positive "evaluation of neighborhood park environment" and "involvement through participation into neighborhood park activities" encourages "attachment to residential area" through "evaluation of residential environment," "involvement through participation into residential activities" and "attachment to neighborhood parks." 2) The difference is revealed that "attachment to residential area" and "attachment to neighborhood parks" have influence on each other only in "Suzaku area" which residents pursue activities.</p>

本研究は，沿道住民の地域や街路樹に対する意識を把握し，そこから街路樹の維持管理への参加意欲に影響する要因の構造を，沿道住民へのアンケート調査結果を用いた共分散構造分析によって探った。その結果，『地域の価値認識』の意識が高まると『街路樹の価値認識』に対する意識も同時に高まり，互いに影響を及ぼし合いながら正の強い影響を与え合うことがわかった。『街路樹の維持管理への参加意欲』は，『街路樹の価値認識』に強く影響を受け，『街路樹の価値認識』は，『街路樹の課題認識』に及ぼす影響が弱く，『街路樹の管理状態に対する評価意識』，『街路樹の果たす役割に対する認識』に強く影響を及ぼす構造であることがわかった。

東大阪市の街路樹における市民要望と空間的・環境的要因の関係性について，市民要望が多い22路線の分析を通じて把握した。その結果，都市部における街路樹の維持管理に関して，「①住居系地区では，良好な居住環境のために樹種特性に即した維持管理を行う。②住商混合地区では，多い大型車両や歩行者に配慮し，見通し確保や落ち葉清掃，殺虫など計画な維持管理を行う。③住工混合地区では，制約が最も大きく車両の見通しに配慮した低木の維持管理を行う。」知見を得た。

Many citizen’s demands on roadside trees make unplanned prunes and a change for the worse landscape. In this study we analyzed a citizen's demands on maintaining roadside trees in Higashiosaka City. To use a method of analysis on administrative operations, we utilize a text data of citizen's demands on maintaining roadside trees that Higashiosaka City government has, and use simple text mining tool. As a result of analysis, we have showed that text mining tool can grasp relations between various citizen's demands visually, and extracted important words and clusters. And as a result of classification of administrative responses, we have confirmed a germinations of public-private partnership and potentials of reflection to maintenance plan of roadside trees.