Since 2013, Hashimoto has also starred in Sailor Suit and Machine Gun: Graduation (2016), of which she also released her debut single for the film.

She has also starred in the films Haruta & Chika (2017), Gintama, The Disastrous Life of Saiki K. (2017), Kaguya-sama: Love is War (2019), Kingdom (2019), Kiss Me at the Stroke of Midnight (2019), and Violence Action (2022).

[6] After that, she appeared in productions by a children's theater company operated by her agency and in dramas by a local TV station.

"[10] A post on "NAVER Summary" titled "Once in a millennium talent: A local idol in Hakata is making a big fuss on the internet when she is too cute (Image of Kanna Hashimoto)".

By November 7 views on the post had exceeded 550,000, and the server for her agency's official website was temporarily down due to excessive access.

[20] In July, she made her first appearance in a nationally broadcast serial drama with Fuji TV's Water Polo Yankees.

[21] Producer Ryota Fujino said, "Having an overwhelming presence and a sense of transparency, I am confident that she will move the characters and the story."

[24] In March 2015 she appeared in the live action of Assassination Classroom as Ritsu, an autonomous thinking fixed gun battery.

[28][29] In June, at a press conference to announce the production of the movie Sailor Suit and Machine Gun: Graduation, a "spiritual sequel" to Sailor Suit and Machine Gun, held at Shinagawa Prince Hotel, it was announced that she would play the role of the main character, the fourth head of the Medaka group, a high-schooler who was a former teenage delinquent and becomes the boss of a yakuza, Izumi Hoshi.

"[32] The trailer, which was released in December, revealed that she would be making her solo debut with the theme song "Sailor Suit and Machine Gun", a cover of the original by Hiroko Yakushimaru and Masami Nagasawa.

[36] Hashimoto, who would be performing solo, said, "I am very nervous to sing to everyone on such a big stage for MJ (MUSIC JAPAN), which everyone dreams of appearing on.

[45] In August, it was revealed that she would play the role of the teenage alien girl Kagura in the Gintama live-action film.

[46][47] In expressing the world view of Gintama, Hashimoto commented, "I'm going to shoot as a strong, lovely, self-paced Kagura.

[49] According to producer Shinzo Matsuhashi, the casting of the heroine Kagura was a bit of a headache: "Director Fukuda and Mr. Oguri told me that Kanna Hashimoto would be the only one, and I thought, 'I see,' and that's how it was decided".

[52] On December 7, she appeared on the first night of 2015 FNS Music Festival, costarring with Hiroko Yakushimaru in the movie theme song "Sailor Suit and Machine Gun".

[55] She portrayed the title character Kaguya Shinomiya in the live-action film adaptation of Kaguya-sama: Love Is War.

[67] Hashimoto, who will play the role of the heroine for the first time in a serial drama, said, "I will try to be able to speedily and comically interact with Mr. Watanabe, and I hope to create a good combination between Sudo and Keiko, just like in the original work.

[75] From beginning to end, she thanked the staff and chairman Atsuro Watabe for their support as the first heroine of the serial drama and the mood maker of this work.

[75] In January 2018 she appeared as the Fukuoka Central Police Station Chief Special Alert for One Day on "Tuesday 9" FINAL CUT.

[78] It was also announced that she would appear as the heroine Kyoko Hayakawa, a former Yankee gang leader, in the October NTV Sunday drama Kyo Kara Ore wa!!.

[81] On December 23, she was revealed to be part of the cast of Twelve Children Who Want to Die which was released on January 25 of the following year by Warner Bros.[82] On July 15, 2019, her official fan club "Hashimoto Junjō Naika o Hossoku" was launched.

[88] On February 6, the award ceremony was held at the Keo Plaza Hotel in Tokyo, and director Hiroazu Kore-eda of the movie I Wish, her screen debut, was the presenter and congratulated her.

On August 20, the movie Kaguya-sama Final: Love is War starring Hashimoto with Sho Hirano was released.

In December 2023, it was announced that Hashimoto would be starring in the TV Asahi 65th anniversary drama Banpaku no Taiyo, its story based on the 1970 Osaka Expo.

Juichi Uehara, a producer at Fuji TV, cited Hashimoto's "miraculous presence that combines perfection and cuteness" as the reason she was cast as Ritsu in Assassination Classroom.

[98] Hashimoto has appeared in numerous commercials for Rohto Pharmaceutical,[99][100] NTT Docomo,[101] UHA Mikakuto,[102] Timee,[103] Gyu-Kaku,[104] and Nissin Foods.

[105] In 2015, her "Devilish Kanna" advertisement for Rohto Pharmaceutical's "Lip Baby Crayon" helped the product reach 200% of its sales target.