Bisan Seto

Japanese: 備讃瀬戸 - びさんせと

Seto lies between Sanuki and Bizen. It is the narrowest part of the Seto Inland Sea, with a width of 6.7 km between Hibi, Tamano City, Okayama Prefecture and Osakihana, Kagawa Prefecture. From east to east, the islands of the Bisan Islands, including Shodoshima, the Naoshima Islands, the Shiwaku Islands, and the Kasaoka Islands, are lined up here, where the east-west tides meet. Most of the Seto Strait has a current of 3-4 knots, and although the waters off the coast of Ozejima reach a depth of 100 m, most are less than 30 m. It has been a key point for water transport since ancient times, and is blessed with a natural beauty of many islands, and was designated the first national park in 1934. 1,500 ships pass through the area every day, and there are many maritime accidents during the foggy season from early spring to early summer.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

讃岐と備前の中間にある瀬戸。瀬戸内海最狭部にあたり，岡山県玉野市日比と香川県大崎鼻間は幅6.7kmである。東から小豆島，直島諸島，塩飽（しわく）諸島，笠岡諸島など備讃諸島に属する島々が並び，東西の干満の潮が出あうところである。潮流3～4ノットの瀬戸が多く，小瀬島沖は水深100mに達するが，大半は30m以下。古代から水運の要衝で，また自然の多島美に恵まれ，1934年国立公園第1号に指定された。1日1500隻の航行量があり，春先から初夏にかけての霧の発生時には海難事故も多い。

出典　株式会社平凡社世界大百科事典第２版について　情報

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