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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
Japanese Pygmy Woodpecker Picoides kizuki	LC	resident	2003	present	A3
Ashy Minivet Pericrocotus divaricatus	LC	breeding	2003	present	A3
Varied Tit Sittiparus varius	LC	resident	2003	present	A3
Japanese Thrush Turdus cardis	LC	breeding	2003	present	A3
Blue-and-white Flycatcher Cyanoptila cyanomelana	LC	breeding	2003	present	A3
Japanese Robin Larvivora akahige	LC	breeding	2003	present	A3
Japanese Accentor Prunella rubida	LC	resident	2003	present	A3
Japanese Grosbeak Eophona personata	LC	resident	2003	present	A3
Yellow Bunting Emberiza sulphurata	LC	breeding	2003	present	A3
Grey Bunting Emberiza variabilis	LC	resident	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.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Forest	good (> 90%)	moderate (70-90%)	near favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Human intrusions and disturbance	happening now	small area/few individuals (<10%)	moderate to rapid deterioration	low
Pollution	happening now	small area/few individuals (<10%)	moderate to rapid deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Most of site (50-90%) covered (including the most critical parts for important bird species)	No management planning has taken place	Very little or no conservation action taking place	low

Year	Protected Area	Designation	% overlap with IBA
1949	Joshin'etsukogen	国立公園	100
1951	Asama	国指定鳥獣保護区	7
1976	Komatsubara	都道府県自然環境保全地域	<1
1980	Shiga Highland	UNESCO-MAB Biosphere Reserve	10
1980	Naebasan	都道府県指定鳥獣保護区	4
1980	Kiyotsukyo	都道府県指定鳥獣保護区	1
1982	Nozori	都道府県指定鳥獣保護区	1
1982	Torikabuto yama	都道府県自然環境保全地域	1
1983	Kusatsu	都道府県指定鳥獣保護区	2
1984	Hoshi	都道府県指定鳥獣保護区	1
1988	Shiga kogen	都道府県指定鳥獣保護区	3
1993	Area around Mt. Saburuyama	森林生態系保護地域	12
2000	Mikuni Line	緑の回廊	1
2001	Asama	都道府県指定鳥獣保護区	2
2003	Saburuyama	都道府県指定鳥獣保護区	4
2004	Yakebita	都道府県指定鳥獣保護区	1
2006	Annandaira	都道府県指定鳥獣保護区	1
2007	Higashi	都道府県指定鳥獣保護区	3
2009	Jigokudani	都道府県指定鳥獣保護区	1
2010	Naebasan	都道府県指定鳥獣保護区	<1
2011	Takai	都道府県指定鳥獣保護区	3
2015	Yoshigadaira Wetlands	Ramsar Site, Wetland of International Importance	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 Asama, Shirane and Tanigawa (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/mounts-asama-shirane-and-tanigawa-iba-japan on 22/11/2024.