Uejima Onitsura (????, April 1661 – 2 August 1738) was a Japanese haiku poet of the Edo period, famous in the Osaka region for his haiku poetry.
Belonging to the Danrin school of Japanese poetry, Uejima is credited (along with other Edo-era poets) of helping to define and exemplify Basho's style of poetry.
Born to a family of brewers in Itami (present-day Hyogo Prefecture), Uejima showed exceptional talent in poetry at the age of eight.
At the age of 25, Uejima moved to Osaka, where he began his professional career in haiku and other forms of poetry.