Underuse, instead of overuse, is a potential threat to biodiversity in semi-natural areas, particularly in East Asia. Due to serious depopulation and aging trends in East Asia, including Japan, few people are being involved in managing green areas and conserving biodiversity. Depending on specific events and age groups that contribute to the experience, knowledge, and preferences of citizens, green area management and biodiversity conservation activities can be effectively conducted through strong collaborations between various stakeholders and generations. We aimed to understand the differences in the perceptions of citizens, belonging to different generations in the metropolitan Nagoya City, towards the Satoyama areas in Japan through an online survey. The status of Satoyama areas is reflected by the rare species of endangered category II in the Act on Conservation of Endangered Species of Wild Fauna and Flora. Analyzing the perceptions revealed gaps in the experience, knowledge, and preference between different age groups for various management and conservation activities. In addition to the intergenerational gaps, gaps between different household income levels and the duration of the activities were identified. The results indicated that reflecting upon the diverse interests among citizens and addressing the causes of the differences is necessary by integrating the differences for consensus building among different stakeholders belonging to different age and socio-economic groups.

在半自然地区，特别是在东亚，利用不足而不是过度利用是对生物多样性的潜在威胁。由于包括日本在内的东亚人口严重减少和老龄化趋势，很少有人参与管理绿地和保护生物多样性。根据对公民的经验、知识和偏好有贡献的特定事件和年龄组，通过各利益相关者和世代之间的强有力合作，可以有效地开展绿地管理和生物多样性保护活动。我们旨在通过在线调查了解大都会名古屋市不同世代的市民对日本里山地区的看法差异。里山地区的状况体现在《濒危野生动植物种保护法》中的濒危Ⅱ类珍稀物种。分析这些看法揭示了不同年龄组在各种管理和保护活动方面的经验、知识和偏好方面的差距。除了代际差距之外，还确定了不同家庭收入水平和活动持续时间之间的差距。结果表明，有必要通过整合属于不同年龄和社会经济群体的不同利益相关者之间的差异来建立共识，从而反思公民之间的不同利益并解决差异的原因。分析这些看法揭示了不同年龄组在各种管理和保护活动方面的经验、知识和偏好方面的差距。除了代际差距之外，还确定了不同家庭收入水平和活动持续时间之间的差距。结果表明，有必要通过整合属于不同年龄和社会经济群体的不同利益相关者之间的差异来建立共识，从而反思公民之间的不同利益并解决差异的原因。分析这些看法揭示了不同年龄组在各种管理和保护活动方面的经验、知识和偏好方面的差距。除了代际差距之外，还确定了不同家庭收入水平和活动持续时间之间的差距。结果表明，有必要通过整合属于不同年龄和社会经济群体的不同利益相关者之间的差异来建立共识，从而反思公民之间的不同利益并解决差异的原因。