Nana Okada

In December, Okada participated and earned the highest score in the AKB48 Group No. 1 Singing Competition qualification round. She placed third in the finals, held at Akasaka ACT Theater on January 11, 2019 with Kano Nojima of SKE48 as the winner.

On July 27, Okada took part in AKB48's first ever live performance in Malaysia, which was part of the Japan Expo Malaysia 2019 in Pavilion Kuala Lumpur.

On March 14, the training and publishing company Benesse released an original promotional anime which featured Okada in her first voice acting role and "Shukkō" as its ending song. On March 15, TC Candler announced that she ranked eighth on their list of 100 Most Beautiful Asia Faces of 2018; Okada later commented that she was "thankful" for the rank, but personally felt that she did not deserve it.

In August, it was announced during an AKB48 concert in Sendai that Okada would be the focus of the fourth episode of the AKB48 documentary series, AKB48 Inside Story (AKB48裏ストーリー , AKB48 Ura Sutōrī) , produced by TBS Television. The episode was aired on November 26, titled Nana Okada, 19 Years Old: The Price of a Dream (岡田奈々19歳、夢の代償 , Okada Nana, 19-sai, Yume no Daishō) , and revealed glimpses of her childhood, her family, and the struggles which led to her eating disorder and subsequent recovery. An extended version was released on January 31, 2017 with around thirty additional minutes of content, including scenes from her nineteenth birthday celebration.

Okada lives in Kanagawa Prefecture, but was born in Neyagawa in Osaka Prefecture and lived there until she was three years old. She has two older brothers and a younger sister. Her eldest brother is a medical professional and often gives her dietary advice. Her sister, Rina, occasionally accompanies her in live streaming sessions and public appearances, notably at the 2016 AKB48 Janken Tournament where they cosplayed as characters from the anime series Re:Zero − Starting Life in Another World. The family owns two Toy Poodles.

In June, Okada placed 5th in the 10th Senbatsu Election after ranking 4th in the preliminaries, thus becoming a Kami 7 (神７ , "God 7", AKB48 Group members who placed within the top seven ranks) for the first time. In her speech, she encouraged the idol otakus to take pride in their support of AKB48 Group and its members and invited them to visit STU48's shipboard theater, which at that time was planned to start operating in the summer.

Nana Okada (岡田 奈々 , Okada Nana, born November 7, 1997 in Osaka Prefecture) , also known as Naachan (なぁちゃん ) , is a Japanese singer. She is a member of the Japanese idol girl groups AKB48, STU48, and Tentoumu Chu! She had the reputation of being a "serious" (真面目 , majime) idol early in her career due to her perfectionism, which has evolved into a more "eccentric" image in recent years. She is a fixture in AKB48's major single lineups since 2016 and is considered one of the best singers in the group.

Okada joined AKB48 as part of the 14th generation trainees, after failing to pass the 13th generation audition the previous year.

In September, Okada was part of the cast for AKB48's musical, a stage adaptation of the manga AKB49: Ren'ai Kinshi Jōrei, playing Haruko Mizuno. In the group's fifth Janken Tournament, she placed 14th, and was in the B-Side of the winner Miyuki Watanabe's solo song. For the group's 38th single "Kibouteki Refrain", Okada did not get selected to sing the title track, but was assigned as one of the centers (the other center being Nagisa Sakaguchi) for one of the B-Sides, "Ima, Happy".

She placed 9th in the 9th Senbatsu Election. In her acceptance speech, in light of many AKB48 Group members recently being involved in scandals to gain exposure, she pledged to keep doing her best to set a good example for the younger members and prove that one can succeed in the group through hard work, especially with her status as captain of STU48 and vice-captain of AKB48 Team 4, and unofficially appointed herself the AKB48 Group Chairman of Public Morals.

In the group's sixth general election to determine the lineup for their 37th single, Okada ranked for the first time, with a position of 51st place, becoming part of Future Girls.

Together with members Ryoka Oshima and Rina Kawaei, they formed Team Kanagawa to promote the new trains in the Yokohama Line. Later in May, she was selected to sing the group's 36th single title track "Labrador Retriever".

On May 28, Okada announced that she would be going on a temporary hiatus due to poor health and physical condition. She returned three weeks later and took part in AKB48's appearance on the June 17 broadcast of Music Station. In the 8th Senbatsu Election, which result announcement took place the next day in Niigata, she placed 14th, thus entering the Senbatsu through election for the first time. In her acceptance speech, she revealed that her hiatus was due to reactive hypoglycemia.