Houkago Princess: 2015
On January 12th, Yamaguchi Miran attended the annual Coming of Age Ceremony, as she would turn 20 that March, marking her as an Adult in Japanese society.
On January 23rd, Houkago Princess publicly released their live DVD HouPri LIVE Lesson 1 ~Live-Lived-Lived~. The DVD debuted on the Oricon Charts at #7.
On February 1st, Sakuragi Nene's Graduation from Houkago Princess was announced. The reason behind her graduation was due to the fact that, since her return from Hiatus, Nene had not met the requirements as a Regular member in terms of performance, attitude and attendance. It was revealed that the original intention was to demote Nene to Cadet status, however through some dispute between both Nene and the Staff, the decision was made that she would instead deny the demotion and withdraw from the group. Nene held her final performance with Houkago Princess and graduated from the group on February 11th, marking the first departure in 7 months.
On February 13th, an announcement was made that both Yamaguchi Miran and Maika would participate in a new promotional unit, DORICHIM (Dream Team). The group was compromised of six members, two from three different groups: Houkago Princess, Idol College and LINKS. The group was created to promote and model fashion brands, as hold events and sell products. The group promoted DOWBL for their first event.
On February 18th, during Odagiri Nana's Birthday performance Love, it was revealed that Nagasawa Marina had been re-admitted to Houkago Princess after proving her dedication to working after holding a job at COCONUTS LOUNGE TOKYO as both a waitress and a gravure model. Upon her return to Houkago Princess as a Candidate, she also became the first member of the groups new little-sister unit, Houpriyusu. It was also announced that Sirosaki Himari had been promoted to the Regular lineup!
It was also on this day that Houkago Princess made the announcement that they would have their long-awaited MAJOR DEBUT under Universal Music Japan!
On March 7th, Kamiya Airi joined Houpriyusu as a new Candidate member alongside Nagasawa Marina. Much like Marina, Airi also worked at COCONUTS LOUNGE TOKYO as a waitress.
On March 14th, Nagasawa Marina revealed that she would release her debut Gravure DVD on April 22nd of the same year, and that it would be titled Minarai Princess. She later revealed that she would also be doing a gravure photoshoot for the magazine Weekly Playboy.
On March 21st, Michishige Saho revealed that she had successfully graduated from University. On March 26th, Sirosaki Himari graduated from High School successfully.
On April 5th, Sekine Sasara joined Houpriyusu as a Candidate member alongside Marina and Airi. On the same day, the groups official Twitter account as opened as hp_youth.
On April 11th, HouPriyusu added a new member, Haruno Akane.
From May 1st until May 13th, Yamaguchi Miran announced that she had suspended activities from Houkago Princess in order to undertake training to become a teacher. She assured her fans that she would be back in time for Tokyo Idol Festival 2015.
On June 2nd, both Yamaguchi Miran and Ayase Miho celebrated 3 years together as Houkago Princess members.
On June 10th, HouPriyusu revealed Izumi Sakura as their newest Candidate member, bringing the group to a total of five members!
On June 17th, Houkago Princess announced the title of their Major Debut mini-album, which had been named Seifuku Cinderella! The release date was set for August 19th. Houkago Princess also announced that they would hold their 4th Anniversary Live and a Commemoration for their Major Debut on August 9th. Their Major Debut mini-album includes six songs, and has three types that are publicly available, as well as 9 various types that were created for Fan Events.
On June 15th, Haruno Akane announced that she would suspend her activities from Houkago Princess due to injuring her foot, rendering her unable to perform.
On June 21st, Sirosaki Himari celebrated her 1 year Anniversary as a member of Houkago Princess. On the 22nd of the same month, Himari celebrated her 19th Birthday.
On July 6th it was announced that Haruno Akane had withdrawn from Houpriyusu. After being absent from the group since June 15th in order to treat her injured foot, both Akane and the Staff discussed her Idol activities, and whether she would be willing to continue or if she felt she would be unstable during performances with her foot being injured. Through much consideration, Akane made the decision to cease her activities and leave the group. From July 7th, HouPriyusu would continue as a 4 member group.
On July 11th, Maika held her 22nd Birthday Live event.
On July 31st, Universal Music Japan revealed a short Music Video preview for Houkago Princesses title track from their mini-album, Seifuku Cinderella.
On August 9th during Houkago Princesses 4th Year Anniversary Live and their Major Debut Commemoration Event, it was announced that Michishige Saho would finally be promoted from an Apprentice, to a Regular Member. After almost 2 years since joining Houkago Princess, Saho would join the rest of the members. She thanked her fans through tears, and stated that she would now begin anew. She would hold her Coronation on August 20th, where she would be promoted as a Regular Member.
In August, Seifuku Cinderella placed 6th on the Oricon Album Ranking chart.
On August 21st, Houkago Princess announced the release of their very first major single, title Kiete, Shirayukihime, which would be released on October 28th, 2015.
On September 6th, Houpriyusu introduced a fifth member into the group, Kojima Mayumi. Mayumi had previously worked as a gravure model before joining the group.
On October 23rd 2015, Nagasawa Marina released her second Gravure DVD, titled Pure Smile.
On October 6th, Universal Music Japan released the short movie clip for Kiete, Shirayukihime. It had also been revealed during this time that the coupling song, Kese nai, nanatsu no hoshi would be the ending theme for the anime Hokuto no Ken: Ichigo Aji, marking this as the first song and anime tie-in for the group.
On October 29th, it was further revealed that Houkago Princess would have their first collaboration with the sweet shop, Jiyugaoka Sweets Forest to celebrate the release of their first major single. A special cake was created in celebration of the single release, and was called Princess・Tiara・role ~Houkago Princess・Shirayukihime Special~. The cake was released for a limited period of time.
Sometime in October, Houpriyusu member Izumi Sakura announced the suspension of her performances, due to an injury to her foot. Her suspension period time was undetermined.
On November 6th 2015, it was announced that Nagasawa Marina of HouPriyusu, who had been participating in the modelling contest Miss iD 2015 via the popular Idol voting app CHEERZ, had won the contest by placing first, holding the most votes. Through this, Marina has since shot for the magazines Cream, Young Jump and Playboy Weekly.
On November 20th 2015, Sekine Sasara released her debut Gravure DVD, Minarai Princess Sasara. She is currently the second member to release a gravure DVD during her time within HouPriyusu, and the third member overall to release a gravure DVD.
On December 11th 2015, it had been revealed through CD sites that Houkago Princess would release their second major single, titled Junpaku Antoinette (originally titled Junpaku no Marie Antoinette). The single is set to release on February 17th, and is a song that will represent both the Student Council President, Odagiri Nana, as well as Japan's White Day. The single's release is a day before the 26th birthday of Odagiri Nana.
There will be 10 editions released for the single, including Regular, Limited and Member solo cover versions.
Sometime in December, Nagasawa Marina announced that she had been shooting for her 3rd Gravure DVD release. The title and release date are yet to be determined.