Region: Japan · Coordinates: 39.016, 140.317 · 8 events
| Year | Source | Account |
|---|---|---|
| AD 795 | Nihon Kōki (Later Chronicles of Japan) | Dewa Province reports: sixty-eight persons, including Bohai envoy Ding Lin and others, were driven ashore in the Emishi land of Shiriha village and robbed. An order was issued to move them to Echigo Province and supply them according to custom. |
| AD 811 | Nihon Kōki (Later Chronicles of Japan) | Imperial edict to the general: entrust 1,000 captive soldiers to Kimiyakōbe no Oyashibe and others to attack Hei village; and deliberate and report on having 1,000 captive troops each from Mutsu and Dewa deployed in left and right formation between the eighth and ninth months. |
| AD 839 | Shoku Nihon Kōki | In the tenth month, after over ten days of rain and thunder on the western shore of Tagawa District, Dewa Province, stones shaped like arrowheads and spearheads were reported to have fallen; Mutsu, Dewa and the Dazaifu were ordered to prepare for unusual events. |
| AD 850 | Nihon Montoku Tennō Jitsuroku | In the sixth month, on day 甲戌, Dewa province, saying its border touches the Emishi and it is always in turmoil, requests one onmyōji (diviner) and is permitted. |
| AD 850 | Nihon Montoku Tennō Jitsuroku | In the tenth month, on day 庚申, Dewa reports that the land split widely, mountain foothills shifted, and many were crushed to death. |
| AD 855 | Nihon Montoku Tennō Jitsuroku | In the tenth month, on day 甲午, the burdens on more than 19,000 needy people of Dewa are remitted. |
| AD 868 | Nihon Sandai Jitsuroku | The province of Dewa reports that six stone arrowheads fell like rain in front of the two shrines of Tsukiyama and Ōmonoki in Akumi district. |
| AD 871 | Nihon Sandai Jitsuroku | On the sixteenth day of the fifth month, Dewa reports that on the mountain of the Ōmonoki shrine in Akumi district a fire broke out on the eighth day of the fourth month, burning soil and stone with a thundering sound; the river turned into blackish muddy water, fish died in droves and rice fields were washed away (the eruption of Mount Chōkai). |