Tamaki Nakanishi was a Japanese voice actress and singer from Okinawa Prefecture, born on February 13, 1976. She was affiliated with the talent management agency 81 Produce throughout her career. Nakanishi began her voice acting career in the year 2000, taking on minor roles in series such as Gravitation and Hamtaro. Her career quickly gained momentum, and she became known for a variety of prominent character roles in the early 2000s.

Nakanishi's notable early work included starring as Shin in the 2001 series Prétear, and as Itsuki Akiba in the 2002 anime I"s. She also voiced Tomoe Tobise in the visual novel Memories Off 2nd in 2001, a role she would reprise in its 2003 anime adaptation and subsequent related video games. Another significant role from this period was Nagatsuki Kuron in Happy Lesson Advanced.

She is perhaps best known for her long-standing association with the Fafner franchise. Nakanishi provided the voice for the character Tsubaki Minashiro in the 2004 television series Fafner in the Azure. She returned to this role years later for the 2010 film Fafner in the Azure: Heaven and Earth. In the 2015 sequel series, Fafner EXODUS, she continued her work within the franchise by voicing both Tsubaki Minashiro and the new character Orihime Minashiro. This recurring role in a major mecha anime franchise stands as a key part of her professional legacy.

Beyond these roles, Nakanishi demonstrated her versatility across a wide range of series and genres. She voiced Neneko in Yumeria, a role for which she also performed as one of the singers of the series opening theme song, 24-Jikan Aishiteru. Her other anime credits include Carbuncle and Yu in the Puyo Puyo game adaptations, Razania in Kyo Kara Maoh!, Ai Nanao in Kanokon, and Asato Luca in Accel World. Her filmography also featured supporting roles in popular series such as D.Gray-man, Paranoia Agent, and Loveless.

In addition to her voice work for anime and video games, Nakanishi was also active in stage acting. In October 2008, she was part of the theatrical trio Carne, which held its first performance in Kōenji. She was noted to have illustration as a hobby and skill.

Tamaki Nakanishi passed away on March 14, 2020, while under medical care. She was 44 years old. Her death was announced by her agency, 81 Produce, and a private funeral was held by her family.