Hotaru Umino (海埜 ほたる, Umino Hotaru, born October 3, 1987), formerly known as Hotaru Mori, is a Japanese AV pornstar from Nagano Prefecture who is affiliated with LINX. She was previously affiliated with Zeal Group. Her body measurements are JP 86-56-84 (US: 34-22-33) (J cup size) and her height is 1.5 m (5 ft). Her hobbies and special skills include horseback riding, reading, cooking, and handicrafts.

In February 2018, she made her AV debut as an exclusive actress for Madonna under the name Hotaru Mori (森 ほたる). In July of the same year, she left the exclusive contract and became an project-based actress. After leaving Zeal Group, she reappeared in 2023 as Hotaru Umino (海埜 ほたる) under LINX.