快晴
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Noun meaning 'good weather' or 'clear skies'. Used to describe sunny, cloudless conditions. Example: 『今日は快晴です』 (kyō wa kaisei desu, 'Today is clear weather').
Theme

Two friends, Ken and User, are planning a weekend hiking trip and discussing the weather forecast.

快晴

かいせい

good weather / clear skies

Nature & EnvironmentNatural Phenomena

Memory Hook

Picture a 'clear, sunny day' that feels 'fast' and 'pleasant' — '快晴' (kaisei) combines 'kai' (快, 'pleasant') and 'sei' (晴, 'clear weather'), so it's 'pleasant clear weather' or 'good weather'.

Cultural Note

In Japan, 『快晴』 (kaisei) is a meteorological term used in weather forecasts to describe completely clear skies with no clouds. It's often associated with ideal conditions for outdoor activities like hanami (cherry blossom viewing) or festivals.

Forms

Base: 快晴Noun meaning 'good weather' or 'clear skies'. Used to describe sunny, cloudless conditions. Example: 『今日は快晴です』 (kyō wa kaisei desu, 'Today is clear weather').