Mount Teshio
mountain in Hokkaido, Japan

Mount Teshio (天塩岳, Teshio-dake) is the tallest mountain in the Kitami Mountains. It is located on the border of Shibetsu and Takinoue, Hokkaidō, Japan. It is the source of the Teshio River.
History
On January 6, 1978, Mount Teshio and the surrounding region was designated the Mount Teshio Prefectural Natural Park (天塩岳道立自然公園, Teshio-dake Dōritsu Shizenkōen).
Geology
Mount Teshio is composed of felsic non-alkali rock from 15 to 7 million years old.
Flora and fauna
At the base of the mountain there are abundant black woodpeckers as well as Japanese red foxes and Hokkaidō brown bears. Near the summit, pika can be found.
Prominent alpine plants on the mountain are Rhododendron aureum and Diapensia lapponica.
Popular Culture
Mount Teshio has been used to inspire the fictional location Teshio Ridge in the 2025 action-adventure video game Ghost of Yōtei. In the game, it serves as the primary location where the player hunts the Kitsune, a member of the Yōtei Six, the main antagonists of the game.
Begin with the source’s own compact description: “Mount Teshio” is mountain in Hokkaido, Japan. The dossier treats that line as a proposition to test through Mount, Teshio and mountain, not as a finished interpretation.
Why this record matters
The phrase “mountain in Hokkaido, Japan” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated May 24, 2026. The linked authority identifier is Q6924093. Authority coordinates are 43.964, 142.888. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1978 and 2025.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Mount Teshio” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.