Evidence map›Paper›PMID 42418416›Full record

ArticlePloS one2026

Identifying surge of exclusionary nationalism: A case study of prewar Japan.

Tomoko Matsumoto, Yutaka Shimada, Hiroyuki Hirate, Tohru Ikeguchi

Abstract readHistorical Article
In one paragraph

Article in PloS one, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Tomoko MatsumotoInstitute of Arts and Sciences, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan.ORCID https://orcid.org/0000-0002-3705-9140
Yutaka ShimadaGraduate School of Science and Engineering, Saitama University, Saitama, Japan.ORCID https://orcid.org/0000-0002-9661-7317
Hiroyuki HirateDepartment of Information and Computer Technology, Tokyo University of Science, Katsushika-ku, Tokyo, Japan.
Tohru IkeguchiDepartment of Information and Computer Technology, Tokyo University of Science, Katsushika-ku, Tokyo, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A rise in exclusionary nationalism can escalate conflicts; however, there are limited quantitative analyses of the timing and magnitudes of such shifts. This study proposes a quantitative approach for tracking changes in exclusionary nationalism by focusing on language, specifically the acceptance/rejection of foreign loanwords. Using 300,110 Japanese newspaper articles spanning 1912-1943-the period surrounding the outbreak of the 1941 conflict with the United States and the United Kingdom-we employed the singular spectrum transformation method to detect change points in exclusionary nationalism. We found that exclusionary nationalism emerged in Japan in 1936 and subsequently exhibited substantial oscillations rather than continuous intensification in the years leading up to the outbreak of the Pacific War. Moreover, attitudes toward potential adversaries and allies were evident from the 1920s. This study deepens our understanding of the role of exclusionary nationalism in conflicts, highlighting its nuanced nature in shaping friend-enemy distinctions during wartime.

Identifiers

PMID42418416
PMCPMC13345258

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.