Yasushi Shoji 교수

Through a quantitative approach, this study aimed to clarify the changes in the number of visitors and visits to green spaces according to green space type before and after the COVID-19 pandemic. We explored the changes in the proportion of repeat visitors and the distance between green spaces and visitors' places of residence. We used KDDI Location Analyzer, which performs novel analysis using mobile phone GPS and census data. The study area included 10 target sites (urban parks and nature trai

This study investigates off-season tours by examining people's heterogeneous preferences for nature-based tours in sub-frigid climate zones. To explore heterogeneous preferences for winter nature-based tours in Shiretoko, Japan, the authors conducted a discrete choice experiment with a latent class model. Even though the visitors' preferences were different, it was possible to segment them into three groups based on the results. The first segment clearly preferred a wildlife observation tour and

Abstract The initial purpose of our study was to understand preferences of stakeholders on green infrastructure for flood control using a discrete choice experiment. However, the results of our study included unexpected findings. According to the utility theory of economics, an inexpensive green infrastructure scenario should have been chosen under ceteris paribus conditions, but our results differed from this expectation. Inconsistent results like ours are often interpreted as indicating bias a

Information on visitor flow is fundamental to the management of recreation areas. Without such data, recreation managers cannot develop appropriate action plans to maintain a healthy ecosystem and the quality of visitor experiences. Little attention has been paid in Japan on estimating the exact number of visitors to a facility, especially in multi-trailhead systems. A new study in Daisetsuzan National Park, northern Japan, develops a systematic method of estimating visitor flow in complicated t

Abstract: This study examines how visitors to Daisetsuzan National Park in Japan perceive its inscription on the World Heritage List by applying stated choice methods. Most visitors regarded the inscription as favourable although their willingness to pay indicated that better visitor control and further conservation of natural resources would be necessary by taking opportunity of the inscription. However, the current situation of World Heritage sites in Japan indicates that the domestic manageme

This study proposes an approach using the Kuhn–Tucker model to determine the extent to which the number of visitors to a recreational site would decrease if a user fee were introduced. This approach is promising in terms of consistency with economic theory and computational feasibility, assuming alternative recreational sites exist. An empirical analysis of national parks in Japan shows that a 1000 JPY fee would hardly decrease the number of visitors to a national park, whereas it would decrease

今日, 自然公園では過剰利用が生じており, 混雑や喧騒により快適な利用が妨げられるだけでなく, 植生の破壊などをも引き起こしている。これらに対しては, 生態系の保護などの新たな価値観を考慮した計画の策定や見直しが必要である。本稿では, 生態系の保護といった評価が不可能であった非利用価値を貨幣として評価できる環境評価の手法・CVM (仮想的市場評価法) について考察する。雨竜沼湿原における「快適な野外レクリエーションの提供」と「植生の保護」に対する支払意志額をCVMを用いて評価すると, 中央値で1,186円, 平均値で1761円と推定された。この結果を基に過剰利用を防ぐための様々な施策を考えることが可能である。

The purpose of this study is to understand the general public’s preferences for forest ecosystem services in Japan using partial profile choice experiments. In cases where the number of attributes being assessed by discrete choice experiment is large, an approach that narrows down the number of attributes is preferable. However, there are certainly situations in which researchers want to value many attributes simultaneously. The method was introduced as a method of adapting discrete choice exp

近年, 自然公園の様々な問題を考える上で, 環境の持つ価値を経済的に評価する環境価値評価が利用され始めている。これら手法にはトラベルコスト法 (TCM) や仮想評価法 (CVM) 等があるが, 信頼性の点からTCMとCVMの評価額を比較することは有用である。本研究で北海道雨竜沼湿原における野外レクリエ-ションの価値をゾーントラベルコスト法 (ZTCM), 個人トラベルコスト法 (ITCM), CVMによって評価を行った。ZTCMの評価額は訪問あたりの平均値で1214.9円, ITCMの評価額は1552.6円, 同じくCVMの評価額は1687.7円と推定された。これらの推定値を直接比較することはできないが, 真の評価額はこれらの値と近い値であると推測できる。

Providing measures to relieve over-use problems are important for management of alpine recreation areas in Japan. For discussing how to control number of visitors, or how many visitors should be limited, it is essential to understand site-choice behavior in those areas. In this study, we explored the modeling of site-choice behavior applying choice experiment, using a sample of fall trekking season in Daisetsuzan National Park. Our results showed that condition of fall leaves and crowding have s