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Coastal Area 12208 West side of Tokyo Bay mouth

Basic Information A separate window opensReferences

Relevant municipalities Yokosuka, Kamakura, Kanazawa, Miura, Zushi, Fujisawa, Hayama, Kanagawa Prefecture
Area (km2) 544

Reason(s) for selection A separate window opensCriteria

Selected due to high levels for the criteria 1, 2 and 5, and selected by MARXAN software.

Characteristics A separate window opensReferences

These waters extend from the Nojima coast on Tokyo Bay through the bay and estuary tidal mud flats and coastal area (Cape Kannon, Miura coast, Cape Tsurugi, Joga Island, Moroiso Bay, Aburatsubo Bay, Koajiro Bay, Odawa Bay, Zushi coast, Shichirigahama and others) of the Miura Peninsula to Enoshima. The Nojima coast constitutes the only natural tidal flat on the Kanagawa Prefecture side of Tokyo Bay, a habitat for Macrophthalmus abbreviatus, razor clam, and other animals that live in the bay's tidal mud flats. The coast in the vicinity of Cape Kannon is home to expansive seaweed communities, mainly kombu kelp and Sargassum fulvellum, while eel grass grows in Aburatsubo Bay and Moroiso Bay, which mark the southern limit of distribution of Zostera caulescens. Hirohakumero grows only in Aburatsubo Bay, Moroiso Bay, and Oshima Island in the city of Yawatahama. These waters also are home to abundant sea jungles where Ecklonia cava and species closely related to Sargassum macrocarpum grow, among others. Zostera caulescens grows at the Miura coast and Koajiro Bay, while Ena Bay, the Oura coast, and the Miura coast are habitats of Zostera japonica. There is a high level of diversity of species along the coast from Bishamon to Cape Tsurugi, which is the northern limit for subtropical seaweed. The natural formation in Koajiro Bay consisting of a water system connecting rivers running through natural woods, river mouths, and estuaries is quite well preserved, and red claw crab, Japanese mitten crab, and other amphidromous animals are abundant here. In the estuarial tidal mud flats of Ena Bay, in which saltwater marshes have formed with common reed communities, Batillaria attramentaria, Macrophthalmus japonicus, Ilyoplax pusilla, and others grow. Odawa Bay is habitat for eel grass, Zostera caulescens, Zostera japonica, Eisenia bicyclis, Ecklonia kurome, Ecklonia cava, species closely related to Sargassum macrocarpum, Ulva pertusa, Ulva fasciata, and Halophila ovalis (Ministry of the Environment, 2001).

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2) 0.3
Moba (seaweed bed) (km2) 39.9
Coral reef coverage (km2)
Natural coast (km) 79.4
Rate of natural coast (%) 25.6
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source

Criteria 1
Takifugu chrysops
Furcina osimae
Gymnogobius uchidai
Halicampus punctatus (Starry pipefish )
Nipponcalaxiopsis manningi
Trizocheles albatrossae
Pagurus ikedai
Richardina rupicola
Majella brevipes
Lebbeus brevicornis
Lebbeus nudirostris
Bathypaguropsis foresti
Munidopsis camelus
Cymonomus curvirostris
Rochinia debilis
<Bivalva, Gastropoda>
Stenothyra edogawensis
Angustassiminea castanea
Cassidula plecotrematoides japonica
Conus boeticus
Solen strictus
Angustassiminea yoshidayukioi
<Other invertebrate>
Aureliana japonica
<Vascular Plants>
Zostera caulescens
Criteria 2
Apus pacificus (Pacific Swift)[Br/Ne]
Monticola solitarius (Blue Rock-thrush)[Br/Ne]
Phalacrocorax capillatus (Japanese Cormorant)
Phalacrocorax capillatus (Japanese Cormorant)[Br/Ne]
Larus crassirostris (Black-tailed Gull)
Larus crassirostris (Black-tailed Gull)[Br/Ne]
Calonectris leucomelas (Streaked Shearwater)
Calonectris leucomelas (Streaked Shearwater)[Br/Ne]
Larus canus (Mew Gull )
Egretta sacra (Pacific Reef-egret)[Br/Ne]
Charadrius dubius (Little Ringed Plover)[Br/Ne]
Larus argentatus (European Herring Gull)
Puffinus tenuirostris (Slender-billed Shearwater)
Pandion haliaetus (Osprey)[Br/Ne]
Larus ridibundus (Black-headed Gull)
Parapristipoma trilineatum (Chicken grunt)[Sp]
Etrumeus teres (Red-eye round herring)[Sp]
Sardinops melanostictus (Japanese pilchard)[Sp]
Pleuronectes yokohamae (Marbled flounder)[Sp]
Amphioctopus fangsiao (Ocellated octopus)
Octopus vulgaris (Common octopus)
Loligo bleekeri (Spear squid)
Criteria 3
Synthliboramphus antiquus (Ancient Murrelet)
Sterna albifrons (Little Tern)
Phalacrocorax pelagicus (Pelagic Cormorant)
Alopias pelagicus
Anguilla japonica (Japanese eel)
Gymnogobius uchidai
Cicindela laetescripta
Chiromantes haematocheir
Helice (Helice) tridens
Ilyoplax pusilla
Macrophthalmus japonicus
<Bivalva, Gastropoda>
Littorina brevicula
<Vascular Plants>
Zostera caulescens
Criteria 4
Calonectris leucomelas (Streaked Shearwater)
Dendronephthya punctata
Eunephthya spiculosa
Paracalyptrophora kerberti
Pennatula fimbriata
Criteria 7
Luciogobius guttatus (Flat-headed goby)
Macrophthalmus abbreviatus
Macrophthalmus japonicus
<Bivalva, Gastropoda>
Truncatella pfeifferi
Idiosepius paradoxus
<Vascular Plants>
Zostera marina (Eel grass)
Halophila ovalis
Aster tripolium (Sea aster)

* This is the species list of which meet the criteria. In that matter, this list does not include all species that inhabit the individual area.
Abbreviation in the information is as follows.
[Br/Ne] : Adjacent water of breeding area or nesting site
[Sp] : spawning area
[Ad] : species not used for analysis but add to the list because inhabit information was collected later
[Ex] : species used for analysis but considered to be possibly extinct in the EBSA region (area)
No mark : data of species distribution


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