Around 1650, two masters arose who elevated haikai and gave it a new popularity.
They were Matsuo Bashō (1644–1694) and Uejima Onitsura (1661–1738) .
Hokku was only the first verse of haikai, but its position as the opening verse made it the most important, setting the tone for the whole composition.
Uejima Onitsura (1661 – 1738) was a Japanese haiku poet of the Edo period, famous in the Osaka region for his poetry.
Belonging to the Danrin school of Japanese poetry, Uejima is credited (along with other Edo-era poets) of helping to define and exemplify Bashō's style of poetry.