noun
leader line
In fishing, the line connecting the main line to the hook or lure; often made of stronger or more abrasion-resistant material.
幹糸にフロロカーボンを使うと、根ズレに強くなる。
Using fluorocarbon for the leader line makes it more resistant to abrasion from rocks.
仕掛けを作るときは、まず幹糸を切ってください。
When making a rig, first cut the leader line.
Compound of 幹 (みき, 'trunk' or 'main part') and 糸 (いと, 'thread' or 'line'), referring to the main connecting line in a fishing rig.