Digging - digging

…There are many types of net fishing, including drag nets, drift nets, cast nets, and set nets, but the four-hand net fishing method, which involves maneuvering a four-hand net aboard a riverboat, and the weir four-hand net fishing method are unique to the rivers that flow into Lake Biwa. Other old-fashioned fishing methods include dokunagashi (poisonous flow), which involves pouring knotweed leaves, pepper and walnut peel juice, and lime into the river, nigoshibuchi (mudgy pools), which involves muddying the river water, seboshi (dried shallows) and kaibori (dug holes), which involve damming the current. Incidentally, cormorant fishing on the Nagara River and other rivers, which is now famous as a tourist spot, was once practiced in many places, as can be seen in the uhiki (cormorant pulling) and torihiki (bird pulling) customs that remain in the upper reaches of the Shimanto River in Kochi Prefecture. …

*Some of the terminology explanations that mention "digging" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…網漁には引網，流し網，投網，伏網などと数多いが，川船に乗って四つ手網を操る四つ手網漁や堰四つ手網漁は琵琶湖に注ぐ河川で特異な技法である。その他，タデの葉，サンショウ･クルミの皮の汁，石灰などを川に流すドクナガシ(毒流)，川水を濁すニゴシブチ(濁淵)，流れをせきとめて行うセボシ(瀬干)，カイボリ(搔掘)なども古風な漁法である。なお，今は観光化して著名な長良川などの鵜飼いも，高知県四万十川上流残存のウヒキ(鵜曳)，トリヒキ(鳥曳)習俗にみるように，かつてはさらに広く各地で行われていた。…

※「搔掘」について言及している用語解説の一部を掲載しています。

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