Kubota Nanami was born on July 23, 2004 in Chiba, Japan.
Sometime in 2015, Kubota signed to the talent agency Production I.
On February 12, 2016, Kubota joined Onigo Musume. She later joined Negaigoto.
On July 6, Kubota graduated from Negaigoto following the conclusion of a live event at Shibuya Vuenos.
In late 2017, Kubota took part in the Hello! Project Shin Member Audition and made it to the finals before it was ultimately decided that no one would pass the audition. Following the audition, Kubota accepted an invitation to join Hello Pro Kenshuusei.
Kubota was introduced alongside Hashimoto Momoko, Goto Sayaka, Tamenaga Shion, Shutto Anna, Kanemitsu Ruru and Matsubara Yuriya at the Hello! Project Kenshuusei Happyoukai 2017 12gatsu ~Conti→New!~ concert on December 10, where they performed a dance cover of "Jealousy Jealousy" together.
On February 5, she participated in a fanclub event titled Hello Pro Kenshuusei Special Event in Nagoya ~Hajimemashite! 6~ at Midland Square Cinema 2 alongside Matsubara Yulia, Saito Madoka, and Onoda Karin.
On July 11, Kubota was one of the first five Hello Pro Kenshuusei members assigned to the rotational Hello Pro Kenshuusei Unit, who will perform in the Hello! Project 2019 SUMMER concert tour starting on July 13.
On October 8, she will participate in a fanclub event titled Hello Pro Kenshuusei Special Event in Nagoya ~Hajimemashite! 7~ at Midland Square Cinema 2 alongside Yonemura Kirara, Hashida Honoka and Murakoshi Ayana.
On July 26, Kubota won the judge's singing award at the Hello! Project Kenshuusei Happyoukai 2020 ~Natsu no Koukai Jitsuryoku Shindan Test~ event for her performance of "Watashi no Miryoku ni Kizukanai Donkan no Hito".
On March 7, it was announced at the end of the Hello! Project Kenshuusei Happyoukai 2021 3gatsu ~Yell~ recital that Kubota will be debuting in a new Hello! Project group on January 2, 2022.
She has a pet dog named Chico.
As of April 2021, Kubota is in her second year of high school.
The following list are notable friendships Kubota Nanami has acquired:
Here is a list of nicknames that was used to refer to Kubota Nanami:
- Name: Kubota Nanami (窪田七海)
- Stage Name: Ichikawa Nana (市川奈々)
- Nicknames: Nana-chan (ななちゃん), Nanami-chan (ななみちゃん), Kubota-chan (くぼたちゃん), Nanacchi (ななっち)
- Birthdate: July 23, 2004
- Birthplace: Chiba, Japan
- Blood Type: A
- Height: 155 cm (5 ft 1 in)?
- Western Zodiac: Leo
- Eastern Zodiac: Monkey
- Hello! Project Status:
- UP-FRONT PROMOTION Status:
- 2017-12-04: Member
- Onigo Musume Member Color: Blue
- Negaigoto Member Color: Pink
- OCHA NORMA Member Color: Pink
- Hello! Project Groups:
- Other Groups:
- Onigo Musume (2016)
- Negaigoto (2016-2017)
- [2020–2021] Hello Dream.
-  Nettai Danshi
-  Shoujotachi no Ketsudan ~Micchaku!! Hello! Project 20 Shuunen Audition~ (AbemaTV)
- [2017-] Hello! Project Station
-  Hello Pro no Oshigoto Challenge! 2
-  Hello! Anison Bu
- She decided to join Hello Pro Kenshuusei with no hesitation at all.
- She stated that she think she's similar to former Morning Musume member Michishige Sayumi because she believes she's cute. She thinks she has a cute character like her.
- She loves to dance in the mirror and do hair and makeup.
- She was a bit nervous with her intro at the Hello! Project Kenshuusei Happyoukai 2017 12gatsu ~Conti→New!~.
- She is learning a little guitar and wants to show it to everyone someday.
- She wants to become a legendary idol like Michishige Sayumi and Tsugunaga Momoko.
- She wants everyone to call her "Nana-chan".
- Gallery:Kubota Nanami
- List:Kubota Nanami Discography Featured In
- List:Kubota Nanami Concert & Event Appearances
- List:Kubota Nanami Publications Featured In
- List:Kubota Nanami Pocket Morning Weekly Q&A
|Youngest member of Hello Pro Kenshuusei Unit
December 29, 2019 – March 7, 2021
- "【ハロ！ステ#285】モーニング娘。'19＆Juice=Juice ひなフェス2019 LIVE！、ハロプロ研修生紹介Movie、こぶしファクトリー最新MV公開！ MC：井上玲音＆谷本安美" (in Japanese). Hello! Project Station (via YouTube). 2019-04-17.
- "市川 奈々 - Production-I" (in Japanese). Production I. 2015-12-29.
- Shoujotachi no Ketsudan ~Micchaku!! Hello! Project 20 Shuunen Audition~ Episode #1. AbemaTV. 2017-11-13.
- Shoujotachi no Ketsudan ~Micchaku!! Hello! Project 20 Shuunen Audition~ Episode #6. AbemaTV. 2017-12-04.
- "ハロプロ研修生に新メンバーが加入！" (in Japanese). Hello! Project. 2017-12-11.
- "「熱帯男子」ビジュアル解禁、日替わり島民ゲストに初演キャストら" (in Japanese). natalie. 2017-12-31.
- "ハロプロ研修生の新体制について" (in Japanese). Hello! Project. 2019-07-11.
- "ハロプロ研修生の新体制について" (in Japanese). UP-FC. 2019-07-11.
- "ハロー！プロジェクト 新グループ結成のお知らせ" (in Japanese). Hello! Project. 2021-03-07.
- BOMB September 2018 Issue.
- "初めましてっ！ 窪田七海！！". Ocha Norma Official Blog. Kubota Nanami. 2021-12-28.