Shijikai Tarōemon served as a bushō during the Azuchi-Momoyama period. He was a retainer of the Ukita clan based in Bizen Province. Tarōemon governed a fief of 1,624 koku and served as a member of the castle guards.
In 1597, during the Keichō Campaign on the Korean Peninsula, Tarōemon participated in the Siege of Namwon Castle in North Jeolla Province. Tarōemon was the first to arrive at the southern gate of the castle.
In 1600, during the Battle of Sekigahara, owing to his age, Tarōemon, along with his older brother, Shijikai Tarōbei, remained behind in Okayama Castle to support the chamberlain, Ukita Munekatsu. After the defeat of the Western Army with whom the Ukita clan affiliated, Tarōemon assisted in turning-over Okayama Castle to Togawa Michiyasu and Ukita Akiie (also known as Sakazaki Naomori) without incident. His place of retirement is unknown.
Individuals who are descendants or relatives of Tarōemon with the Shijikai surname reside in present-day Okayama.