Hokusai's One Hundred Views of Mount Fuji includes an image of the small crater at a secondary eruption site on the southwestern slope.

[5] The event was characterized as a plinian eruption, with pumice, scoria, and ash shot into the stratosphere and raining down far east of the volcano.

[8] Although it brought no lava flow, the Hōei eruption released some 800 million cubic metres (28×10^9 cu ft) of volcanic ash, which spread over vast areas around the volcano, even reaching Edo almost 100 kilometres (60 mi) away.

Cinders and ash fell like rain in Izu, Kai, Sagami, and Musashi provinces, and ash-fall was recorded in Tokyo and Yokohama to the east of the volcano.

The tephra released from the volcano caused an agricultural decline, leading many in the Fuji area to die of starvation.

Heavy rainfall in August 1708 caused an avalanche of volcanic ash and mud, breaking the dams and flooding the Ashigara plain.

The crops began to fail when the released ash descended upon the fields, leading to widespread starvation in the Edo (renamed Tokyo in 1869) area.

[14] Debris that included large rocks, floodwater, and ash, restricted relocation which led to further casualties from hunger in the Edo area.

The Hōei quake caused stress and compression of the magma chambers underneath Mount Fuji, leading to the eruption.

At 8 km depth, there are magma chambers of a dacitic and andesitic nature while at the deepest portion of the dike, a basaltic melt is located.

However, the southeastern portion of the dike which remained clamped by the Genruko quake was unbuckled by the reduced normal stress in that area by the Hōei earthquake.

[6] A repeat of the 1707 Hōei eruption may impact over 30 million people in the highly populated areas of eastern Tokyo, Kanagawa, Chiba and parts of Yamanashi, Saitama, and Shizuoka.

[20] The volcano would most heavily affect Tokyo and would likely cause power outages, water shortages, and malfunctions in the highly technical city.