Changes in fish distribution and migration patterns have occurred in mid- and high-latitude oceans worldwide in response to global change. Since the 1980s, the sea surface temperature (SST) of the Sea of Japan has increased significantly. The mechanisms behind these changes in migratory fish assemblages are difficult to determine from general capture fishery databases. This study collected a long-term dataset of set-net catches reported from Toyama Bay in western Japan to analyse catch compositions. The results indicated that in the coastal zone at the front of the Tsushima warm current and Liman cold current, increased SSTs have caused fluctuations both in the presence of cold-water and warm-water fish and in the timing of fishing seasons. Additionally, the results based on multi-dimensional scaling and cluster analyses showed that the study period can be divided into 5 clusters: (1) 1963–1964, (2) 1966–1972, (3) 1973–1998, (4) 1999–2006, and (5) 2007–2013; the similarity value was 89%. The boundaries between these clusters were similar to the timing of changes in SST, Pacific decadal oscillation, and North Pacific gyre oscillation. A species composition change analysis of these clusters showed that clustering was associated with changes in the intensities of the Tsushima warm current and Liman cold current. A northward expansion of low-latitude fish species, especially small- and medium-sized fish, was observed in Toyama Bay, similar to the expansion of high-latitude fish species into polar regions. Based on the principles of risk management and these research results, the adaptation strategies recommended in this study were differentiated into two categories: proactive adaptation and planned adaptation. (1) Establishment of pre-disaster adaptation capability: Proactive adaptation emphasizes countering the uncertainty in marine fishery production and improving the resilience of local communities. (2) Establishment of resilience during and after climate disasters: Planned adaptation can be used to manage uncertainty in the seafood supply by implementing adjustments in production and marketing and also to mitigate the impact of climate variation on the marine fishery industry and local coastal communities.

响应全球变化，全球中高纬度海洋发生了鱼类分布和迁移方式的变化。自1980年代以来，日本海的海表温度（SST）显着提高。从一般捕捞渔业数据库很难确定迁徙鱼类组合这些变化背后的机制。这项研究收集了日本西部富山湾报告的长期集净渔获量数据集，以分析渔获物成分。结果表明，在对马暖流和利曼冷流前部的沿海地区，海温增加导致了冷水和温水鱼的存在以及捕捞季节时机的波动。另外，基于多维标度和聚类分析的结果表明，研究时期可以分为5个聚类：（1）1963–1964，（2）1966–1972，（3）1973–1998，（4）1999–2006 ，以及（5）2007-2013；相似值为89％。这些星团之间的边界类似于海表温度，太平洋年代际振荡和北太平洋回旋振荡变化的时间。这些集群的物种组成变化分析表明，集群与对马暖流和利曼冷流强度的变化有关。在富山湾，观察到低纬度鱼类特别是中小型鱼类向北扩展，类似于高纬度鱼类向极地地区扩展。根据风险管理原理和这些研究结果，在这项研究中建议的适应策略分为两类：主动适应和计划适应。（1）建立灾前适应能力：主动适应强调应对海洋渔业生产中的不确定性并提高当地社区的适应力。（2）在气候灾害期间和之后建立抵御能力：计划的适应措施可用于通过实施生产和销售调整来管理海鲜供应的不确定性，还可减轻气候变化对海洋渔业和当地沿海社区的影响。主动适应强调强调应对海洋渔业生产中的不确定性并提高当地社区的适应力。（2）在气候灾害期间和之后建立抵御能力：计划的适应措施可用于通过实施生产和销售调整来管理海鲜供应的不确定性，还可减轻气候变化对海洋渔业和当地沿海社区的影响。主动适应强调强调应对海洋渔业生产中的不确定性并提高当地社区的适应力。（2）在气候灾害期间和之后建立抵御能力：计划的适应措施可用于通过实施生产和销售调整来管理海鲜供应的不确定性，还可减轻气候变化对海洋渔业和当地沿海社区的影响。