快 connects a pleasant feeling with comfort, clear weather and cheer. Learn it in complete words.
The idea
快 has 7 strokes; follow the linked stroke-order diagram. 快適（かいてき） means comfortable, 快晴（かいせい） means a clear sky, and 愉快（ゆかい） means cheerful or enjoyable. 快適 and 愉快 take な before a noun.
Examples
- この部屋は快適です。This room is comfortable.
- ホテルで快適な夜を過ごしました。I spent a comfortable night at the hotel.
- 昨日は快晴でした。The weather was perfectly clear yesterday.
- 快晴の日は山が見えます。On a clear day you can see the mountains.
- 祖父は愉快な人です。My grandfather is a cheerful person.
- 友達と愉快な時間を過ごしました。I had an enjoyable time with my friends.
Read-aloud uses a synthetic Japanese voice available on your device. Voice quality and availability vary; it does not assess your pronunciation.
No Japanese device voice is available. You can still read the text and use the linked listening resources.
Watch out
快 does not always describe a cheerful person: 快適 describes comfort and 快晴 describes weather. Do not confuse 快 with 決, which has the water component on the left.
Try it yourself
Write the reading of 快適 in hiragana.
Show answer or example answer
かいてき
快適 is かいてき: この部屋は快適です means this room is comfortable.
Write the reading of 快晴 in hiragana.
Show answer or example answer
かいせい
快晴 is かいせい: 昨日は快晴でした describes yesterday’s clear weather.
Choose the missing kanji: 愉＿（ゆかい）［快／決］.
Show answer or example answer
快
快 completes 愉快（ゆかい）, meaning cheerful or enjoyable; 決 does not form this word.
Practice round
Answer questions, then rebuild Japanese sentences where available. We keep your score.
Write the reading of 快適 in hiragana.
Write the reading of 快晴 in hiragana.
Choose the missing kanji: 愉＿（ゆかい）［快／決］.
Tap the words in the right order.
Tap the words in the right order.
Tap the words in the right order.
Keep your progress
Sign up for free to save your practice results in your account.
Sign up to saveI already have an accountUse it today
Write 快 using the diagram, cover the readings, and read the three words. Then describe a comfortable place.