Project's main acts consist of Morning Musume, Angerme, Juice=Juice, Camellia Factory, Beyooooonds, Ocha Norma and Rosy Chronicle.

Project include Aya Matsuura, Maki Goto, Mini-Moni, W, Melon Kinenbi, Berryz Kobo, Cute, Country Girls and Magnolia Factory.

In 1997, Japanese rock group Sharam Q, fronted by Tsunku, began auditions for a female vocalist.

These auditions aired via the reality show Asayan, and resulted in Michiyo Heike being crowned winner.

Tsunku decided to give five of the runners-up, Yuko Nakazawa, Natsumi Abe, Kaori Iida, Asuka Fukuda and Aya Ishiguro, named "Morning Musume", a chance to become a group by selling 50,000 copies of their demo single "Ai no Tane" in just five days.

Lemon Hall), under the name "Michiyo Heike and Morning Musume," (平家みちよとモーニング娘。) the fan club of the two acts was called "Hello!"

In March 2001, Morning Musume co-founder and leader Yuko Nakazawa announced her graduation from the group, which took place in April.

[12] Duo Frances & Aiko, later named Big Small Sister, was also announced from the same audition.

Project scaled back on initial plans to expand overseas around 2010 and refocused their interests in Japan.

Hello Pro Awards '09: Elder Club Sotsugyō Kinen Special)—featuring 21 groups and 72 members.

Pro Egg members, named Smileage, who later debuted on a major label in May 2010 with the single "Yume Miru 15".

Pro Kenshusei members was announced,[19][20] They previewed their debut song at the Hello Project concert series held on March 2–3.

Project 2015 winter concert, a new group consisting of Hello Pro Kenshusei members was announced[23] and was named Magnolia Factory.

The 400 yen monthly subscription plan allowed users of the app to gain access to exclusive content such as "Hello!

On October 29, 2015, Riho Sayashi announced her graduation from Morning Musume '15 in order to study English and dance abroad, but would stay as a member of Hello!

Project Kids member Momoko Tsugunaga announced that she would also retire from entertainment after her graduation in spring 2017.

On June 9, 2017, it was announced that Country Girls would change to a new system after Momoko Tsugunaga's departure.

Project Station YouTube channel, revealing the new placements of the transferring Country Girls members and a few promoted Hello Pro Kenshuusei, including a new group led by Reina Ichioka.

Project after a year and half long hiatus due to health issues, which resulted in her graduating from her debut group Country Girls during her absence.

On February 28, 2018, an Instagram campaign, titled "Hello Pro here" (or "H!P here"), was announced in order to grow closer with international fans.

On May 1, 2018, staff announced that a new web show based on viewer feedback was being planned for summer 2018.

Project COUNTDOWN PARTY 2018 ~GOOD BYE & HELLO!~ first part, Ayaka Wada announced that Mizuki Fukumura would become the new leader of Hello!

Project stores were closed due to emergency measures established by the government to prevent the spread of the COVID-19 pandemic.

Project TikTok account opened up, and select songs from the current active groups were made available to use for editing in the app.

Unlike previous years, these concerts featured the members performing solo covers of J-Pop ballads by artists outside of Hello!

They made the decision to hold the concerts despite the pandemic due to the members' desire to stand on stage as soon as possible.

Through the site, fans are able to purchase streaming tickets to access digital video recordings of concerts, events, or other shows featuring Hello!

Project members would begin broadcasting via TV Tokyo every Thursday starting on January 13, 2022.

Project members would be making appearances in each episode of the drama as guest performers at the guesthouse.

Project shuffle unit featuring one member of the current six groups was announced as part of a collaboration with the snack company Kasugai Seika for its candy brand Tsubu Gummy.