Measurements of Radio-Frequency Electromagnetic Field Levels in EXPO2025 Osaka, Kansai, Japan.

Teruo Onishi, Kazuhiro Tobita, Miwa Ikuyo, Kaoru Esaki, Masao Taki

Abstract read

In one paragraph

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

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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

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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

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5 · Who and what money

Authors and funding

5 authors.

Teruo OnishiElectromagnetic Compatibility Laboratory, National Institute of Information and Communications Technology, Koganei, Tokyo, Japan.

Kazuhiro TobitaElectromagnetic Compatibility Laboratory, National Institute of Information and Communications Technology, Koganei, Tokyo, Japan.

Miwa IkuyoElectromagnetic Compatibility Laboratory, National Institute of Information and Communications Technology, Koganei, Tokyo, Japan.

Kaoru EsakiElectromagnetic Compatibility Laboratory, National Institute of Information and Communications Technology, Koganei, Tokyo, Japan.

Masao TakiElectromagnetic Compatibility Laboratory, National Institute of Information and Communications Technology, Koganei, Tokyo, Japan.

Funding

Bioelectromagnetic Environment Research and Evaluation Technology Research on Radio Wave SafetyMinistry of Internal Affairs and Communications JPMI10001

6 · The paper itself

Abstract

In this study, we investigated radio‑frequency electromagnetic field (RF‑EMF) levels at the Expo 2025 Osaka, Kansai, Japan, a large‑scale international event that attracted approximately 26 million visitors during the event period. Spot and portable measurements were conducted for broadcast, 4G, 5G, and ISM bands in both indoor and outdoor environments. The observed E‑field strengths remained below the reference levels specified in the Japanese Radio Radiation Protection Guidelines, with the maximum E-field strength corresponding to 0.4% of the guideline limits. The RF‑EMF levels measured at the venue were comparable to those measured in typical urban areas and consistent with findings from similar studies conducted overseas. These results confirm that the level of RF‑EMF exposure during high‑density public events in Japan remains below regulatory limits and exhibits behavior trends similar to those observed in ordinary urban environments.

Indexed as

Electromagnetic FieldsRadiation MonitoringRadio WavesJapan5Gexposure monitoringlarge‐scale eventmobile phone systemsRF‐EMF level

Identifiers

PMID42358104

DOI10.1002/bem.70062

PMCPMC13305685

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