The Japan Meteorological Agency warned of strong aftershocks and landslide risks following a magnitude-6-weak earthquake that struck Yamanashi Prefecture [1].
This warning follows a significant loss of life and infrastructure damage, signaling a period of continued instability for residents in the region.
The earthquake occurred on June 26, 2026, at 22:28 JST [2]. The epicenter was located in Fuji-Kawaguchiko town, Yamanashi Prefecture, at a depth of approximately 20 kilometers [3]. Officials reported a maximum seismic intensity of Shindo 6-weak [2].
Casualties from the event were severe. According to the Fire and Disaster Management Agency, eight people died in Yamanashi, and five died in Tokyo [4]. Additional injuries were reported in Kanagawa [4].
During an emergency press conference held on June 27, 2026, at JMA headquarters in Tokyo, officials addressed the ongoing risks [5]. Ebita Ayaki, the chief of the Earthquake & Volcano Division, said that aftershocks of similar intensity to the initial quake could occur.
JMA officials said the earthquake loosened the ground, which has increased the probability of landslides [6]. They advised the public to remain alert for approximately one week [7].
Despite the proximity of the epicenter to Mount Fuji, JMA officials said there was no observed impact on the volcano [8].
“Eight people died in Yamanashi and five died in Tokyo”
The occurrence of a Shindo 6-weak earthquake in a populated region like Yamanashi highlights the persistent seismic vulnerability of central Japan. By issuing a week-long warning for landslides and aftershocks, the JMA is attempting to mitigate secondary casualties that often occur when weakened structures or unstable slopes collapse during smaller subsequent tremors.
