満まん潮ちょう線せん

noun

high-water mark; high-water line

Refers to the line or mark left on a shore or structure by the highest tide. Often used in coastal, legal, or environmental contexts.

See also: 干潮線

• 満まん潮ちょう線せんより上うえに家いえを建たてる必ひつ要ようがある。

  You need to build the house above the high-water mark.