彼は旅先の景色を見て美しい俳句を詠んだ。
Looking at the scenery on his trip, he composed a beautiful haiku.
祖母は毎朝俳句を一句作るのを日課にしている。
My grandmother makes a habit of writing one haiku every morning.
俳句には季節を表す言葉を入れるのが決まりだ。
The rule is that a haiku includes a word that evokes the season.