Case No. #1477

The Electromagnetic Disturbances at the Former Naval Arsenal

Category: ApparitionResolution: UnexplainedLocation: Japan / KanagawaRecorded: Sep 6, 2026, 9:46 PM

Summary

Between 2017 and 2021, staff and visitors at a public facility built on the grounds of the former Yokosuka Naval Arsenal in Kanagawa reported recurring anomalies in the old warehouse wing: surveillance footage disappearing every Thursday night at the same time, localized lighting failures, compass app deviations, and a persistent cold spot in the southeastern corner. Electromagnetic field readings in that corner were consistently 2–3 millitesla above ambient. Historical research established that the corner was struck directly in the July 1945 air raid, with at least twelve fatalities recorded.

Details

The Yokosuka Naval Arsenal was central to Japanese naval construction from the Meiji era through the end of the Second World War. A portion of the postwar complex was converted to public use; the anomalies now on record are concentrated in the old warehouse building constructed in the 1940s, currently serving as an exhibition hall.

In April 2017, a facility staff member noticed that surveillance camera footage from the southern corridor of the old warehouse building went dark every Thursday night for approximately twenty minutes, consistently between 2:00 and 2:20 a.m. The footage cut without warning and resumed as if uninterrupted. Replacing both the camera hardware and the recording system did not resolve the phenomenon. The power company found no voltage drop at those times.

From 2018 onward, exhibition hall visitors began filing reports about the southeastern corner: lighting that flickered at regular intervals; smartphone compass applications drifting significantly when pointed in a specific direction; and a sudden cold sensation when standing near the corner. An investigator who brought an EMF meter recorded readings 2–3 millitesla higher than ambient levels at the location across multiple measurement sessions.

In 2020, a local historian established that the southeastern corner of the warehouse building corresponded to the area struck by a direct bomb hit in the air raid of July 18, 1945. Written records from the period document at least twelve worker fatalities at that specific location. Physical traces of the strike were removed during postwar renovation, but documentation suggests the original foundation remains in place beneath the current floor.

Since 2021, the corner area has been closed to public access at the facility's discretion. Visitor reports have ceased. The Thursday night surveillance footage gap continues. Electromagnetic variation at the location has been measured at six-month intervals and confirmed as persistent.

Timeline

April 2017Staff discover surveillance footage in the old warehouse corridor disappears every Thursday night, 2:00–2:20 a.m.
2017–2018Camera and recording hardware replaced; phenomenon continues unchanged. Power company finds no voltage anomaly.
From 2018Exhibition visitors report flickering lights, compass drift, and sudden cold in the southeastern corner.
2019EMF readings in the southeastern corner consistently 2–3 mT above ambient.
2020Historian confirms the corner corresponds to a July 1945 direct bomb strike with at least twelve documented fatalities.
2021–presentCorner area closed to public. Footage gap continues. EMF variation confirmed at six-month intervals.

Witness Testimony

Facility staff member (male, 40s)"Even after we replaced the camera and the recorder, it goes dark every Thursday. Same time every week. The electrician couldn't explain it. I've gotten used to it. New staff always get frightened."

Exhibition visitor (female, 30s)"When I approached the southeastern corner, I felt something like pressure — not cold, exactly, but like the air had weight. My friend said the same thing without me prompting her. It wasn't coincidence."

Local historian (male, 60s)"The records show people died in that exact location on July 18, 1945. The building was renovated, but the ground beneath doesn't change. I believe places hold memory. Perhaps this one expresses it as electricity."