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Coastal Area 13304 Adjacent waters of Yoshino and Naka River mouths

Basic Information A separate window opensReferences

Relevant municipalities Anan, Komatsushima, Matsushige, Tokushima, Naruto, Tokushima Prefecture
Area (km2) 149

Reason(s) for selection A separate window opensCriteria

Selected due to high levels for the criteria 1, 2, 3, 7 and 8, and selected by MARXAN software.

Characteristics A separate window opensReferences

These waters include the Naruto Strait (on the Shikoku side), and the mouths of the Yoshino and Naka rivers. The sea extending in front of the coast in the Naruto Strait is high in biodiversity, with a mixture of sargassum, Ecklonia cava and Ecklonia kurome beds, and others. It also is a wakame-producing region. Uchinoumi (partly included in the important waters) is home to the only large collection of eel grass beds on the Shikoku side of the Seto Inland Sea. Here and there in the expansive brackish waters at the mouths of the Yoshino and Katsuura rivers are abundant saltwater marshlands, with very high populations of fiddler crabs. They also provide habitat for Neripteron cornucopia, Clistocoeloma sinensis, and pea crab. The river-mouth tidal mud flats of the Yoshina River also are visited by snipe and plover, with relatively high populations during the migration seasons of spring and fall. Here at least 1% of the minimum estimated population of Kentish plover has been recorded, as has at least 0.25% of the minimum estimated population of black-bellied plover, lesser sand plover, and dunlin. Spotted greenshank, little curlew, Far Eastern curlew, and common redshank have been recorded here (Ministry of the Environment, 2001). In addition, the Yoshino River is habitat to the rare insects Cicindela lewisi and Cicindela inspecularis, as well as Cylindera elisae, big-headed ground beetle, various other beetles, and other river-mouth and seashore insects. In particular, there is no other habitat like it in Japan where large numbers of Cicindela lewisi, a rare species that has lost habitat across Japan, still live (Sunose et al., 1999).

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2) 2.6
Moba (seaweed bed) (km2) 0.7
Coral reef coverage (km2)
Natural coast (km) 9.4
Rate of natural coast (%) 11.2
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source

Criteria 1
Platalea minor (Black-faced Spoonbill)
Branta bernicla (Brent Goose)
Lates japonicus (Japanese lates)
Cottus kazika (Fourspine sculpin)
Lateolabrax latus (Blackfin seabass)
Uca arcuata
Pinnotheres bidentatus
<Bivalva, Gastropoda>
Cyclina sinensis
Angustassiminea castanea
Cassidula plecotrematoides japonica
Stenomelania rufescens
Assiminea estuarina
Solen strictus
Assiminea parasitologica
Corbicula japonica
Criteria 2
Neophocaena phocaenoides (Fineless porpoise)
Monticola solitarius (Blue Rock-thrush)[Br/Ne]
Larus canus (Mew Gull )
Phalacrocorax carbo (Great Cormorant)[Br/Ne]
Egretta sacra (Pacific Reef-egret)[Br/Ne]
Chlidonias hybrida (Whiskered Tern)
Sterna albifrons (Little Tern)
Sterna albifrons (Little Tern)[Br/Ne]
Charadrius dubius (Little Ringed Plover)[Br/Ne]
Charadrius alexandrinus (Kentish Plover)[Br/Ne]
Larus saundersi (Saunder's Gull)
Larus argentatus (European Herring Gull)
Falco peregrinus (Peregrine Falcon)[Br/Ne]
Sterna dougallii (Roseate Tern)
Sterna dougallii (Roseate Tern)[Br/Ne]
Pandion haliaetus (Osprey)[Br/Ne]
Larus ridibundus (Black-headed Gull)
Ammodytes personatus (Japanese sand lance)[Sp]
Engraulis japonicus (Japanese anchovy)[Sp]
Seriola quinqueradiata (Japanese amberjack)[Sp]
Trachurus japonicus (Japanese jack mackerel)[Sp]
Pagrus major (Red seabream)[Sp]
Sepioteuthis lessoniana (Bigfin Reef Squid)
Amphioctopus fangsiao (Ocellated octopus)
Octopus vulgaris (Common octopus)
Criteria 3
Podiceps cristatus (Great Crested Grebe)
Sterna albifrons (Little Tern)
Histrionicus histrionicus (Harlequin Duck)
Larus saundersi (Saunder's Gull)
Sterna dougallii (Roseate Tern)
Lates japonicus (Japanese lates)
Anguilla japonica (Japanese eel)
Gymnogobius macrognathos
Cottus kazika (Fourspine sculpin)
Leucopsarion petersii (Ice goby )
Apocryptodon punctatus
Cicindela laetescripta
Cicindela inspecularis
Cicindela lewisi
Chiromantes haematocheir
Helice (Helice) tridens
Parasesarma plicatum
Uca arcuata
Ilyoplax pusilla
Sesarmops intermedium
Macrophthalmus japonicus
<Bivalva, Gastropoda>
Laemodonta siamensis
Stenomelania rufescens
Littorina brevicula
Glauconome angulata
<Vascular Plants>
Salicornia europaea (Common Glasswort)[Ex]
Criteria 7
Luciogobius pallidus
Luciogobius guttatus (Flat-headed goby)
Uca arcuata
Macrophthalmus japonicus
<Bivalva, Gastropoda>
Neritina pulligera
Stenomelania rufescens
Neripteron sp. 
Cerithidea rhizophorarum
Cerithideopsilla cingulata
Truncatella pfeifferi
Corbicula japonica
<Vascular Plants>
Salicornia europaea (Common Glasswort)[Ex]
Aster tripolium (Sea aster)
Artemisia fukudo

* 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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