do choreographed dancing for the show, focusing all their energy on singing. Ebichu's 11th single "Sing Along, Sing a Song" was released on November 8. From October 8 to November 24, Ebichu's last tour with Hirota, "Shiritsu Ebisu Chugaku Autumn Nine Tour 2017 ~Ebichu-tte nanka Setsumei shizurai kedo Mitokanakya son-na Group nandatte!~" took place, totaling 9 concerts. On January 3 and 4, 2018, Ebichu performed two consecutive shows at Nippon Budokan. The first, titled "forever aiai" was their last performance with Aika Hirota. The second, was their first performance with the current 6 member lineup, and was titled "ebichu pride". 10th anniversary, Music and Playlist (2018–2021) From April 21 to July 22, Ebichu embarked on their first tour with their current lineup, titled "Shiritsu Ebisu Chugaku SHAKARIKI SPRING TOUR 2018 ~New,Gakugeeeekai of Learning~ (Shin – Gakugeikai no Susume)", totaling 20 dates. On May 23, Ebichu released a cover of "Jiyū e Michizure" by Ringo Sheena, as part of the tribute album "Adam to Eve no Ringo". The same day, Ebichu's discography was made available on music subscription services. Ebichu's 12th single "Dekadonden" was released on June 6. The sixth installment of the summer "Famien" shows, held for two days for the first time, took place on August 18–19. On September 22, the second installment of the autumn "Chūon" shows took place. From November 3 to December 1, Ebichu embarked on a 6 date tour titled "Shiristsu Ebisu Chugaku Aki Tour 2018 ~9nen-me, Gimu Kyouiku karano Sotsugyou~", with each date having a setlist decided by a different member. From December 23 to 25, Ebichu performed 3 consecutive shows at Makuhari Event Hall. During the rehearsal for the second day, Mirei Hoshina fell from the stage, and was hospitalized. The following shows were performed with 5 members. While initially the extent of Hoshina's injuries was not made clear, it was later revealed that she had suffered a cerebral contusion, a fractured skull and a traumatic subarachnoid hemorrhage. Hoshina made her return to the stage on February 17, 2019, performing one song with the other members. Following this, she continued to make limited appearances during concerts, gradually increasing the number of songs she participated in. On March 13, Ebichu released their 5th album "MUSiC", the first in a series of releases commemorating their 10th anniversary as a group. The album contains the singles "Sing Along, Sing a Song" and "Dekadonden", with the former