[3] Her musical style mixes influences from J-pop, rap, post-hardcore, experimental pop, art rock, and electronica.

[12] In September, she release her first double A-side single "Hello@New World / Torikobo Sareta Machi Kara Ai wo Komete" which was written in collaboration with Japanese singer-songwriter Mariko Goto.

[13] On October 26, Nemuri held her first one-man live titled "Boku wo Saishuu Heiki ni shita nowa Kimi sa" at Musashino Kokaido, Tokyo.

In place of the cancelled show, she held a livestream performance on YouTube called "Unused VISA" on March 23.

[35][36] In June, Nemuri shared the music video of "Trust Nothing but Love" [37](Japanese title: Ai Yori Tashika na Mono Nante Nai).

[38] On June 19 (Juneteenth) Nemuri released a fund raise single titled "Heart of Gold (Demo)" through her Bandcamp site in support for the Black Lives Matter protest movement with all sales being donated to the NAACP (The National Association for the Advancement of Colored People).

[42] Nemuri shared a long statement about the song and the inspiration behind it, in which she discusses social division and the hope she finds in 'praying'.

[46] "Seventh Heaven" The theme song of the movie, Colorless (Japanese: Sarugakucho de Aimasho) was released as a single on May 28.

[47] Nemuri followed up with another single titled "Old Fashioned" in July [48] along with a music video that includes English subtitled lyrics that directly expressed her anger and resignation to society.

[55][56] Nemuri had also appeared on stage with Pussy Riot performing the song "Police State", stunning the crowds.

[64] On September 13, Haru Nemuri held a kick off party for her "Shunka Ryougen North America Tour 2022" at Space Odd Shibuya in Tokyo, Japan[65] In October, she embarked on her "Shunka Ryougen Tour" starting in North America which included a show at the Pop Montreal Festival, Toronto, and thirteen shows in the United States.

[71][72] She then resumed her North American tour from Houston up to Atlanta to complete a string of shows which were postponed from the year before from March 2023.

Few days before her "Shunka Ryougen Tour Final" Nemuri released a single titled '"Wrecked", expressing protest against the proposed 'Immigration Control and Refugee Recognition Act Amendment' which was passed in Japan on June 9th.

The Japan tour had ended in Tokyo, Shibuya WWW X with Mass of the fermenting dregs opening the show.

[89][90] Anthony Fantano of The Needle Drop reviewed her debut album Haru to Shura, mentioning that "Haru Nemuri's debut album pushes J-pop/rap in an exciting direction by channeling Japan's rich history of underground rock music.

"[91] Haru Nemuri's Shunka Ryougen had been hailed by Pitchfork ("Blending elements of J-pop, rap, and hardcore, the experimental Japanese artist's latest album presents a convincing balance of nihilism and hope.

That's why the album is as celebratory as it is volcanic),[94] Stereogum ("We named genre-exploding Japanese musician Haru Nemuri, who mixes pop, rock, and hip-hop into her own beautifully experimental cocktail, one of the best new artists of 2018.

The word appears throughout Shunka Ryougen's song titles, and it's key to how the record reconfigures Nemuri's blend of art rock, noise pop, and hip-hop"[64] Haru Nemuri has mentioned Shimura Masahiko (Fujifabric), Seiko Oomori, Shinsei kamattechan, Björk,[97] and Susumu Hirasawa[98] as her major influences.

[99] She also mentioned Rage Against the Machine had taught her "Art exists in a dimension that is inseparable from society and (thanks to them) I learned how to think about that responsibility.

[101] Nemuri has touched on her ideology in regards to punk; she believes it is about love, anger, and even kindness itself, and living in this world and society, where she personally feels that it is inevitable or very natural to be associated with feminism.

She has introduced herself as a "riot grrrl",[102][103][104] which she believes is "one of the few 'names' that I feel I can use my energy to live with or fight against the inconveniences and biases that come from advocating it.

"[6] In an interview with Billboard Japan, Nemuri explained, "I try to make sure that the voices of the parties concerned aren't lost in my words.

I'm open about the fact that I'm a liberal feminist, so people who defend contrary positions don't approach me very often...They're for me; I write my songs in desperation, in order to survive.

Things that are done in desperation have energy, so there might be people who are pulled along by it, and I also believe that writing songs and presenting them is a violent act like hitting someone.