干かん満まん

noun, noun which may take the genitive case particle 'no'

ebb and flow; tidal rise and fall

Refers to the cyclical rising and falling of the tide. Often used in compound expressions like 干満の差 (tidal range).

• 干かん満まんの差さが大おおきい海かい岸がんでは、潮しお干ひ狩がりが楽たのしめる。

  On coasts with a large tidal range, you can enjoy clam digging.