|Birthdate||September 7, 2002|
|Current Age||20 Years Old|
|Agency||Seed & Flower|
|Social Networks||Official Blog / SHOWROOM|
|Idol Career Info|
|Debuted||August 2017 / 2nd Generation|
- 1 Trivia
- 2 Group History
- 3 History
- 4 Single Participation
- 5 Album Participation
- 6 Photobooks
- 7 Media Appearances
- 8 Other Links
- 9 Gallery
- Her audition SHOWROOM number was #25
- Admired Members: Nishino Nanase, Nagahama Neru, Ushio Sarina
- She calls herself an "Ushio Sarina oshi"
- Favorite Foods: Hamburger steak (especially tofu burger) with demiglace sauce
- Favorite Artist: Sumika and GReeeeN
- Favorite Animal: Dog
- Best School Subject: Science
- Hobbies: Watching anime and reading novels, particularly ones that have been made into movies
- Charm point: Long eyelashes
- Special skills: Volleyball (blocker), abacus, mental math
- Catchphrase: I'll run up Osaka, Kosaka, Hintazaka, all three-zaka with all my might!" (大阪、小坂、日向坂、三本坂を全力で駆け上ります! Osaka, Kosaka, Hinatazaka, mihonzaka wo zenryoku de kake noborimasu!)
- She has an older brother who liked Keyakizaka46.
- Her nickname (Kosakana) is her name without the 'o' in the end, but also means 'little fish'.
- She loves reptiles and dinosaurs. The social media accounts created to promote her first photobook were called "Kosakanatops", a portmanteau of "Kosakana" and "Triceratops".
- She is known for having a calm personality.
- She was inspired to audition for Hiragana Keyakizaka46 after watching the Zepp Namba (Osaka) performance of Hiragana National Tour 2017 in May 2017.
- She had no dance experience prior to joining the group.
- Before it was announced who the hosts of Hiragana Oshi would be, the members were asked who they wanted to have as host. Nao was the only member to choose Audrey, the comedy duo who was eventually selected. Her reason was "they are good at talking, so I thought it was sure to be fun if we had them as MC".
- For this reason she was nominated as co-host Wakabayashi Masayasu's favorite member.
- She ranked first in the Lucky Girl Ranking 2019 on Hiragana Oshi.
- She is close friends with Kamimura Hinano. On a segment on HINABINGO!, chose Hinano as her ideal little sister and Hinano chose her as her ideal big sister.
- She is close friends with Kanemura Miku, as they are of the same generation and only three days apart in age. Their duo name is called NaoMiku.
- Hiragana Keyakizaka46 2nd Generation → Hinatazaka46 2nd Generation
- On May 19th, made her runway modeling debut at the "Rakuten Girls Award 2018 SPRING/SUMMER"
- On June 1st, became an exclusive model for "Seventeen" magazine.
- On February 11th, it was announced that Hiragana Keyakizaka46 would become a new independent group, Hinatazaka46. Nao would therefore become part of Hinatazaka46's 2nd Generation.
- On March 27th, was selected as center for Hinatazaka46's debut single, Kyun. She would continue on in the center role for all single A-sides until Kimi Shika Katan in May 2021.
- On March 30th, appeared as a model at the "Mynavi presents 28th Tokyo Girls Collection 2019 SPRING/SUMMER".
- On May 18th, appeared as a model at the "Rakuten Girls Award 2019 SPRING/SUMMER".
- On September 7th, appeared as a model at the "Mynavi presents 29th Tokyo Girls Collection 2019 FALL/WINTER".
- On November 6th, starred in Thinking Dogs' music video "Spiral".
- On November 15th, starred in the movie "Kyoufu Ningyo" (恐怖人形 Horror Doll).
- On December 23, served as image model for Nishizen's new furisode brand, "Kosaka Nao -Kosaka Nao- Furisode".
- On January 15th, starred as Sada Yuria in the Hinatazaka46 drama series DASADA.
- In April, began a regular radio appearance on the program "Hoshi no Dragon Quest presents Hinatazaka46 Kosaka Nao's 'Kosakana Radio'".
- On June 26th, announced her hiatus from all activities due to poor physical condition.
- On June 29th, released her first photobook, Kimi wa Dare?. The book was printed at 150,000 first edition copies, the highest of any Shueisha or Sakamichi Series photobook.
- On March 4th, returned from her hiatus and resumed activities with Hinatazaka46.
- Kyun (Center)
- Doremisolasido (Center)
- Konna ni Suki ni Natchatte Ii no? (Center)
- Sonna Koto Nai yo (Center)
- Kimi Shika Katan
- Boku Nanka (Center)
- Tsuki to Hoshi ga Odoru Midnight
- NO WAR in the future (Kaze ni Fukarete mo)
- Hanbun no Kioku (Glass wo Ware!) (Center)
- Happy Aura (Ambivalent)
- Kimi ni Hanashite Okitai Koto (Kuroi Hitsuji) (Center)
- Dakishimete Yaru (Kuroi Hitsuji) (Center)
- [2021.06.29] Kimi wa Dare?
- Keyakitte, Kakenai?
- Hiragana Oshi (2018 – 2019)
- Hinatazaka de Aimashou (2019 - )
- HINABINGO! (2019)
- Self-Documetary of Hinatazaka46 (2020)
- DASADA (2020)
- Kyoufu Ningyo (恐怖人形) (2019)
- Hinomaru Soul 〜Butaiura no Eiyuutachi〜 (ヒノマルソウル〜舞台裏の英雄たち〜) (2021)
- Thinking Dogs - SPIRAL
- Hinatazaka46 no All Night Nippon 0(ZERO) (2019 – )
- Hoshi no Dragon Quest presents Hinatazaka46 Kosaka Nao no Kosakana Radio (星のドラゴンクエストpresents 日向坂46小坂菜緒の「小坂なラジオ」) (2021 - 2022)
- Hiragana Keyakizaka46 New Member Profile
- Hinatazaka46 Member Profile
- Seventeen Model Profile
- Kosaka Nao 1st Photobook Twitter
- Kosaka Nao 1st Photobook Instagram
Kosaka Nao (2019 - Kuroi Hitsuji)
Kosaka Nao (2018 - Hashiridasu Shunkan)
Kosaka Nao (2018 - Glass wo Ware!)
Kosaka Nao (2017 - Kaze ni Fukarete mo)