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Investigating participant learning through international joint fieldwork: implications from a study program on local sustainability in Nagasaki Prefecture, Japan
Get PDFGiven the urgent need for sustainable actions, the development of collective learning and collaboration across communities has become increasingly critical. International joint fieldwork provides a unique platform to tackle these challenges by connecting diverse localities and enabling the exchange of knowledge, perspectives, and context-specific solutions. This study provides empirical data on types of learning processes and themes emerging through international joint fieldwork drawing on a study program in Nagasaki Prefecture, Japan. Building on this empirical data, we also aim to identify factors that can effectively promote knowledge exchange and capacity building across different cultural and disciplinary contexts, by demonstrating how the design of the joint fieldwork supported these outcomes and by discussing the learning processes that emerged. Through applied thematic analysis of dialogue transcripts and post-fieldwork questionnaires, the study identified four critical dimensions of learning: (1) the introduction and conceptualization of new ideas, (2) the cultivation of cross-cultural understanding, (3) the redefinition of researchers’ roles within societal contexts, and (4) the examination of social transformations across gender and generational boundaries. We also identified three key drivers that play a crucial role in international joint fieldwork for sustainability, i.e., (1) intergenerational knowledge transfer, (2) modeling behavior, and (3) gender transformative approach. This research has provided evidence for the potential of international joint fieldwork as a tool for sustainable development. In particular, collaboration across generations and genders was one of the essential topics that the present study identified. We suggest the need for further research, particularly to consider more inclusive models that ensure diverse participation, especially from marginalized or underrepresented groups within the local context.Discover Sustainability, 6(1), art. no. 671; 2025journal articl
小学校家庭科の洗浄に関する学習の課題－家庭科の意義および授業実践を通して－
Get PDF長崎大学教育学部教育実践研究紀要, 24, pp.63-75; 2025departmental bulletin pape
高等学校歴史総合における社会的判断力育成を目指した単元開発
Get PDF長崎大学教育学部教育実践研究紀要, 24, pp.147-156; 2025departmental bulletin pape
Emergence of Dengue Virus Serotypes 1 and 3 in Mahottari and Adjacent Areas of Southern Nepal
Get PDFDengue has been a serious public health concern in Nepal since the past few years, with concurrent big outbreaks occurring in 2022–2024. This cross-sectional study was conducted among febrile patients visiting hospitals in Mahottari district in southern Nepal. A total of 2141 dengue-suspected patients were investigated by routine laboratory assays and serological and molecular techniques, including real-time quantitative polymerase chain reaction (RT-qPCR). Among them, 455 (21.3%) were confirmed as dengue cases. The majority of dengue cases (435, 95.6%) had a primary dengue infection. The total bilirubin level was significantly higher in secondary dengue infection than in primary (p = 0.032). The major dengue virus (DENV) serotypes responsible for this outbreak were DENV-1 (45.5%) and DENV-2 (40.9%), while 13.6% patients had DENV-3 infection. DENV-3 infection showed a significantly higher viral load (median: 7.71 Log10 copies/mL; range: 6.48–7.94) compared to DENV-1 (6.72 Log10 copies/mL; 5.49–7.17) and DENV-2 (4.76 Log10 copies/mL; 2.32–6.96). Adult patients exhibited a significantly higher viral load than children (p = 0.035). NS1- and IgM-positive as well as admitted patients had a higher viral load (p < 0.05). Co-circulation of multiple serotypes (DENV-1, -2, -3) was confirmed with the first introduction of DENV-1 and DENV-3 in Mahottari and surrounding areas in the 2023 outbreak. Identification of the circulating DENV serotypes is crucial to understanding the epidemiological trend and dynamics of population immunity. These findings underscore the need of nation-wide integrated surveillance, including genomic data generation, in Nepal for disease control, prevention, and potential vaccine implication.Pathogens, 14(7), art. no. 639; 2025journal articl
Detection of Dengue and Chikungunya Viruses in Mosquitoes from Nepal
No full textThe dengue virus (DENV) and chikungunya virus (CHIKV) infection present with similar symptoms and are transmitted by Aedes mosquitoes. Until now, there have been no reported cases of DENV and CHIKV being detected in mosquitoes in Nepal. This study identified circulating arboviruses from mosquitoes collected in the capital city Kathmandu, and Dhading, Bhaktapur, and Lalitpur districts of Central Nepal in 2023. Of 105 Aedes pooled samples, 16 (15.2%) were positive for DENV, and six (5.7%) were positive for CHIKV by quantitative real-time polymerase chain reaction. DENV-2 was the most common serotype (11.4%), aligning with recent outbreaks in Nepal in 2023, followed by DENV-3 and DENV-4 (1.9% each). To the best of our knowledge, our study is the first report to detect DENV and CHIKV in Aedes mosquitoes circulating in Nepal. This study highlights the need for mosquito surveillance to prevent future outbreaks of mosquito-borne diseases in Nepal.American Journal of Tropical Medicine and Hygiene, 113(2), pp.378-381; 2025journal articl
Characteristics of snakebite patients due to Naja samarensis in the Philippines: a prospective hospital-based study
Get PDFBackground: Little is known about snakebites by Naja samarensis, a species unique to the Philippines. The aim here is to describe the clinical and epidemiological characteristics of patients bitten by this medically important cobra in the Eastern Visayas. Methods: A hospital-based prospective study analysed the features of snakebite patients attending Eastern Visayas Medical Center between June 2022 and May 2023. Logistic regression analysis identified the factors associated with severity. Results: A total of 175 snakebite patients with five fatalities were included. Naja samarensis was most commonly implicated (n=49, 28.0%), although it could be definitively identified, by examining photographs of the snake responsible, in only four cases. The N. samarensis bites occurred in grass or rice fields, in daytime, and during farming activities, but the people bitten were most frequently students (34.7%) who were bitten at home (36.7%). Patients bitten by N. samarensis often presented with cytotoxic (63.3%) and neurotoxic signs (46.9%). Traditional remedies were common, resulting in delayed presentation to the hospital. Bites by N. samarensis, and older age (>44 y) were independently associated with severity (adjusted OR of 10.33 and 7.89, respectively). Conclusion: Naja samarensis is a major cause of severe snakebites in this region. Pre-hospital treatment frequently involves wasted time and unproven traditional methods. Enhancement of public awareness is urgently needed. Development of a diagnostic test for species identification is warranted to improve future surveys and management.Transactions of the Royal Society of Tropical Medicine and Hygiene, 119(8), pp.933-942; 2025journal articl
Ecological overview of hard ticks (Ixodida: Ixodidae) in Nagasaki prefecture of western Japan during winter 2021–2022
Get PDFIn Japan, Japanese spotted fever, Lyme disease and severe fever with thrombocytopenia syndrome caused by Ixodidae species are endemic. To prevent and control the diseases, fundamental understandings in tick ecology are crucial. Hence, this study aimed to analyse tick species richness and abundance across Nagasaki prefecture including its remote islands from a wide range of environments. A total of 74 sampling points screening during winter 2021–2022, using dragging method resulted in 14,883 tick samples (279 adults, 7148 nymphs and 7456 larvae) in 11 species belonging to four genera. Haemaphysalis flava dominated adult populations, while H. formosensis was predominant among nymphs. Both species are possible vectors of Japanese spotted fever and severe fever with thrombocytopenia syndrome. The ecological analysis revealed more complex species distribution in the remote islands compering to the main island in both adults and nymphs. In addition, the ground temperature was a significant regulatory factor for both adults and nymphs. The research provides valuable insights on tick distributions, ecological groupings and environmental preferences in Nagasaki. These findings contribute to the fundamental understanding of tick ecology and could contribute to design strategies for tick population control and tick-borne disease prevention in Nagasaki or possibility to nearby areas.Scientific Reports, 15(1), art. no. 4114; 2025journal articl
Phylogenetic Study of Local Patterns Influenza A(H3N2) Virus Transmission in a Semi‐Isolated Population in a Remote Island in Japan Between 2011 and 2013
Get PDFBackground: Influenza A outbreak risk is impacted by the potential for importation and local transmission. Reconstructing transmission history with phylogenetic analysis of genetic sequences can help assess outbreak risk but relies on regular collection of genetic sequences. Few influenza genetic sequences are collected in Japan, which makes phylogenetic analysis challenging, especially in rural, remote settings. We generated influenza A genetic sequences from nasopharyngeal swabs (NPS) samples collected using rapid influenza diagnostic tests and used them to analyze the transmission dynamics of influenza in a remote island in Japan. Methods: We generated 229 whole genome sequences of influenza A/H3N2 collected during 2011/12 and 2012/13 influenza seasons in Kamigoto Island, Japan, of which 178 sequences passed the quality check. We built time-resolved phylogenetic trees from hemagglutinin sequences to classify the circulating clades by comparing the Kamigoto sequences to global sequences. Spatiotemporal transmission patterns were then analyzed for the largest local clusters. Results: Using a time-resolved phylogenetic tree, we showed that the sequences clustered in six independent transmission groups (1 in 2011/12, 5 in 2012/13). Sequences were closely related to strains from mainland Japan. All 2011/12 strains were identified as clade 3C.2 (n = 29), while 2012/13 strains fell into two clades: clade 3C.2 (n = 129) and 3C.3a (n = 20). Clusters reported in 2012/13 circulated simultaneously in the same regions. The spatiotemporal analysis of the largest cluster revealed that while the first sequences were reported in the busiest district of Kamigoto, the later sequences were scattered across the island. Conclusion: Kamigoto Island was exposed to repeated importations of Influenza A(H3N2), mostly from mainland Japan, sometimes leading to local transmission and ultimately outbreaks. As independent groups of sequences overlapped in time and space, cases may be wrongly allocated to the same transmission group in the absence of genomic surveillance, thereby underestimating the risk of importations. Our analysis highlights how NPS could be used to better understand influenza transmission patterns in little-studied settings and improve influenza surveillance in Japan.Influenza and other Respiratory Viruses, 19(3), art. no. e70089; 2025journal articl
コミュニティを基盤とした原爆関連慰霊碑 体験的記憶の自然的滅却をめぐって
Get PDFAs we near the 80th anniversary of Nagasaki's atomic bombing, nuclear disarmament remains a distant objective, and we continue to grapple with crucial matters such as Atomic-bomb survivor support, honoring the deceased, and fostering peace. The passing of time and the aging of survivors, however, make it increasingly challenging to transmit their firsthand accounts. While the preservation of these experiences and the responsibility for doing so remain contentious, shifting values and demographic changes inevitably lead to waning interest in the atomic bomb disaster. This research examines ten community-based memorial monuments constructed between 1946 and 1955, exploring their origins and the endurance of associated commemorative practices. These structures, erected by nine local communities within a two-kilometer radius of the hypocenter, initially served as grave markers at temporary burial sites. They were established by individuals who undertook the gruesome task of body collection, remains cremation, ash gathering, and burial in the aftermath of the atomic bomb. This study contends that the loss of the generation with direct memories of these events, coupled with demographic changes and population aging in local communities, jeopardizes the continuation of community-based memorial practices.多文化社会研究, 10, pp.15-46; 2025departmental bulletin pape