Tanaka Rena announced her marriage through her agency on 5 February. According to her agency, Tanaka's husband is a 40-year-old doctor who she met through friends and started dating since last summer. In her statement, Tanaka revealed that they had submitted their marriage application on the same day and commented that she was attracted to her husband's honest character and mild temperament. She also commented that she would like to build a warm family with him who understands her well and continue working hard on each project that comes her way. Tanaka ended the signed statement by thanking everyone for their support so far and asked for the same going forward.
Tanaka made her debut in the 1998 Suntory beverage CM "Nacchan" and acted in her first movie "Ganbatte Ikimasshoi" the same year. She can be seen in the ongoing NHK drama "Itooshikute".