Lake Kasumigaura, Ukisima

IBA Criteria

Year of most recent IBA criteria assessment: 2004

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Anas crecca NR winter 2003 present A4i
Pacific Golden Plover Pluvialis fulva LC passage 2003 present A4i
Little Ringed Plover Charadrius dubius LC breeding 2003 present A4i
Marsh Grassbird Helopsaltes pryeri NT breeding 2003 present A1, A3
Ochre-rumped Bunting Emberiza yessoensis NT breeding 2003 present A3

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2015 high near favourable low
Was the whole site covered? No State assessed by Habitat
Accuracy of information -

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Biological resource use hunting & collecting terrestrial animals - intentional use (species being assessed is the target) happening now small area/few individuals (<10%) slow but significant deterioration low
Biological resource use hunting & collecting terrestrial animals - persecution/control happening now some of area/population (10-49%) very rapid to severe deterioration high

Condition of habitat (state)
Habitat Habitat Detail Reference Area (ha) Actual Area (ha) % of habitat remaining % of carrying capacity (overall) Result
Wetlands (inland) 0 0 good (> 90%) moderate (70-90%) near favourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Whole area of site (>90%) covered by appropriate conservation designation No management plan exists but the management planning process has begun Some limited conservation initiatives are in place low
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Ushibori chisaki 都道府県指定鳥獣保護区 1,125 protected area overlaps with site 0
Ukishima 都道府県指定鳥獣保護区 300 protected area overlaps with site 0
Takasuzaki 都道府県指定鳥獣保護区 166 protected area is adjacent to site 0
Takahamairi 都道府県指定鳥獣保護区 460 protected area overlaps with site 0
Suigo-Tsukuba 国定公園 34,956 protected area contains site 17,000
Kasumigaura 都道府県指定鳥獣保護区 5,290 protected area overlaps with site 0
Edozaki 都道府県指定鳥獣保護区 1,468 protected area overlaps with site 0
Ayumisaki 都道府県指定鳥獣保護区 970 protected area overlaps with site 0


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Freshwater lakes and pools, Permanent swamps -
For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Lake Kasumigaura, Ukisima. Downloaded from on 17/05/2022.