Samurai zlash!

I read a novel "Startide Rising" translated by Japanese.
The book is SF (science fiction).

I found Yosa Buson's haiku in the book.
David Brin this book's author referenced "Anthology of Japanese Literature" by Donald Keene.

Harusame ni
  nuretsutsu yane no
    temari kana

As the spring rains fall,
  soaking in them, on the roof,
    is a child's rag ball.

from "Anthology of Japanese Literature from the Earliest Era to the Mid-Nineteenth Century"

What's Haiku?
Haiku is Japanese poem.
Haiku has 5-7-5 phrases and word of a season.
I cannot understand and explain...

Ref.

• Amazon.co.jp: Anthology of Japanese Literature from the Earliest Era to the Mid-Nineteenth Century (UNESCO Collection of Representative Works: European) by Donald Keene
• Amazon.co.jp: Startide Rising (first half) [Japanese translation] by David Brin
• Amazon.co.jp: Startide Rising (last half) [Japanese translation] by David Brin