importance

the Chūgoku region (western part of Honshu comprising the prefectures of Okayama, Hiroshima, Yamaguchi, Tottori, and Shimane)

the northeast region of Japan, specifically the northernmost six prefectures in Honshu (clockwise from the northermost): 青森県 (Aomori-ken), 岩手県 (Iwate-ken), 宮城県 (Miyagi-ken), 福島県 (Fukushima-ken), 山形県 (Yamagata-ken), 秋田県 (Akita-ken).

historian

study of history

(Internet slang, especially anime and manga fandom) events or things from the past which one wants to whitewash/erase from history (due to it being embarrassing, poorly received, etc.); dark past

(historiography) Chinese local chronicle

oral history

Setouchi Region: Region of Japan's inland sea (the body of water separating Honshū, Shikoku, and Kyūshū, three of the four main islands of Japan) and coastal areas roundabout

local newspaper