Regarding the Earthquake with Maximum Seismic Intensity of 5 Lower Originating in Eastern Yamanashi and the Fuji Five Lakes (Occurred at 22:29 on June 26), We Announce the Distribution Status of 'ProP biz' Emergency Earthquake Alert Service

At approximately 22:29 on June 26, an earthquake with a maximum seismic intensity of 5 lower occurred, with its epicenter in eastern Yamanashi Prefecture and the Fuji Five Lakes region. A seismic intensity of 5 lower was observed in Fujikawaguchiko Town, Yamanashi Prefecture, and intensities ranging from 5 upper to 1 were recorded from the Tohoku region to the Chugoku region. We extend our deepest sympathies to all those affected by this disaster.

※ Japan Meteorological Agency (JMA) website: https://www.jma.go.jp/jma/press/2606/27a/202606270040.html

Nankai Electric Co., Ltd. (Headquarters: Osaka City, Osaka Prefecture; President and CEO: Ryohei Ohmae; hereinafter 'Nankai Electric') provides the emergency earthquake alert distribution service 'ProP biz' (hereinafter 'ProP biz service'). This service delivers predictive information before seismic shaking arrives, supporting disaster prevention measures for businesses and facilities.

※ ProP biz website: https://propbiz.jp/

We hereby report the distribution status of our service for areas near the earthquake's epicenter.

※ Lead time is an estimated value from the receiving terminal. There may be discrepancies with actual shaking.

Reference: JMA Announcement Materials

"Regarding the Earthquake in Eastern Yamanashi and the Fuji Five Lakes at Approximately 22:29 on June 26, 2026"

(https://www.jma.go.jp/jma/press/2606/27a/kaisetsu202606270040.pdf), modified for this report.

For companies near the epicenter, lead times were short, but they increased with distance from the epicenter. Even a brief lead time allows for automatic equipment control using the contact output function of receiving terminals.

Addressing Concerns: "Can Alerts Arrive in Time for Direct-Under Earthquakes Close to the Epicenter?"

The epicenter of this earthquake was only about 7 km in straight-line distance from Company A's location, which received our alert. Despite this proximity, a 5-second lead time was achieved because our service fully supports PLUM (Propagation of Local Undamped Motion), one of the seismic intensity estimation methods.

When an earthquake occurs, the JMA transmits data such as epicenter information as text messages. While some distribution services do not support PLUM, our 'ProP biz' service is fully compatible, enabling us to issue alerts based on PLUM measurement results, as demonstrated in this earthquake.

What Can Be Done in a 5-Second Lead Time? The Value of Speed Revealed by JMA Data

A 5-second lead time might seem fleeting.

However, according to a JMA survey of victims from past major earthquakes (e.g., the Hyuganada Earthquake in August of Reiwa 6), nearly 70% expressed a desire for even faster emergency earthquake alerts. Considering this time as precious for actions like protecting one's head or moving to a safe space free of collapsing objects, earlier alerts are undoubtedly more beneficial.

Reception Demo During Earthquake (Note: Actual audio will play)

https://propbiz.jp/wp-content/themes/nankai/video/index/demo.mp4

Automated Initial Response, Without Human Intervention, Saves Lives and Businesses

Our service name 'ProP biz (Proppu Bizu)' embodies the strong commitment to 'Protect People.' Earthquakes strike without regard to time or location.

Nankai Electric will continue to support the safety of facilities and the people within them across Japan through advanced distribution technology and a 24/7/365 monitoring system.

Nankai Electric Co., Ltd.

- Disaster Prevention Sales Department (Eastern Japan): 03-6757-1050 - Disaster Prevention Sales Department (Western Japan): 06-4967-6181 - Inquiry via Website: https://propbiz.jp/form/ - Nankai Electric Website: https://propbiz.jp/