Imai Sōkyū (今井 宗久, 1520 – 31 August 1593) was a 16th century merchant in the Japanese port town of Sakai, and a master of the tea ceremony.
Around 1554, after donating a large sum to the Daitoku-ji, he organized a shake-up in the local merchant circles by which he climbed into a position of considerable influence, and became a member of the city's leadership council.
Shortly afterwards, when Nobunaga sought to lay claim to Sakai, many members of the council debated seeking defense from the Miyoshi clan, but Sōkyū was among those who suggested that the city submit.
He acted as mediator to arrange the peaceful submission of the city, and was rewarded by Nobunaga with a lucrative commission to manufacture firearms for the Oda clan, and a post as a local magistrate.
Sōkyū passed on his business and his official post to his son, Imai Sōkun, who would continue his father's legacy as tea master and advisor to Hideyoshi, and later to Tokugawa Ieyasu.