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The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Copper Pheasant Syrmaticus soemmerringii	NT	resident	2003	present	A3
Mandarin Duck Aix galericulata	LC	breeding	2003	present	A3
Eastern Crowned Warbler Phylloscopus coronatus	LC	breeding	2003	present	A3
Asian Stubtail Urosphena squameiceps	LC	breeding	2003	present	A3
Japanese Thrush Turdus cardis	LC	breeding	2003	present	A3
Brown-headed Thrush Turdus chrysolaus	LC	breeding	2003	present	A3
Blue-and-white Flycatcher Cyanoptila cyanomelana	LC	breeding	2003	present	A3
Narcissus Flycatcher Ficedula narcissina	LC	breeding	2003	present	A3
Grey Bunting Emberiza variabilis	LC	breeding	2003	present	A3

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	likely in long term (beyond 4 years)	small area/few individuals (<10%)	slow but significant deterioration	low
Climate change and severe weather	likely in long term (beyond 4 years)	small area/few individuals (<10%)	slow but significant deterioration	low
Energy production and mining	likely in long term (beyond 4 years)	small area/few individuals (<10%)	slow but significant deterioration	low
Human intrusions and disturbance	likely in long term (beyond 4 years)	small area/few individuals (<10%)	slow but significant deterioration	low
Pollution	likely in long term (beyond 4 years)	small area/few individuals (<10%)	slow but significant deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Some limited conservation initiatives are in place	medium

Year	Protected Area	Designation	% overlap with IBA
1950	Bandai asahi	国立公園	98
1964	Miomote	都道府県指定鳥獣保護区	1
1964	Takanosu	都道府県指定鳥獣保護区	<1
1975	Nurumata sawa-Nogawa	都道府県自然環境保全地域	2
1975	Imagami yama	都道府県自然環境保全地域	<1
1976	Narumi san	都道府県自然環境保全地域	<1
1976	Suzuga taki	都道府県自然環境保全地域	<1
1979	Kijiyama-nogawa	都道府県指定鳥獣保護区	1
1980	Mayasan	都道府県指定鳥獣保護区	1
1980	Imagami	都道府県指定鳥獣保護区	<1
1983	Shibakura	都道府県指定鳥獣保護区	1
1983	Daizumoriyama	都道府県指定鳥獣保護区	<1
1983	Gassan	都道府県指定鳥獣保護区	<1
1984	Otori asahi	国指定鳥獣保護区	20
1985	Tamugimata	都道府県指定鳥獣保護区	3
1985	Okura	都道府県指定鳥獣保護区	1
1997	Tachiyazawa	都道府県指定鳥獣保護区	1
1997	Hayama	都道府県指定鳥獣保護区	1
2003	Asahi Mountain Range	森林生態系保護地域	37
2004	Chokai-Asahi and Iide-Azuma	緑の回廊	7
2007	Aizometoge	都道府県指定鳥獣保護区	1

Habitat1	Habitat detail	% of IBA
Forest		-

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Mounts Asahidake and Gassan (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/mounts-asahidake-and-gassan-iba-japan on 22/11/2024.