The Book (Yoasobi EP)
The Book (stylized in all caps) is the debut extended play (EP) and first physical release recorded by Yoasobi. It was released on January 6, 2021, the same day with their seventh single "Kaibutsu", through Sony Music Entertainment Japan. "Encore" serves as a promotional single of the EP. Ayase, a member of the duo, also released the cover version of "The Book", on the same day as the EP, titled "Mikunoyoasobi", recorded by Hatsune Miku, exclusively at Tower Records Japan. Commercial performance. "The Book" debuted at number two on the Oricon Albums Chart, behind SixTones's  1ST, selling 72,238 copies in its first week. and 146,745 copies as of 2021. It topped Oricon Digital Albums Chart for five consecutive weeks and the year-end chart with 100,656 downloads in 2021 alone, becoming the only album to reach this milestone in the year. For "Billboard Japan" Hot Albums, "The Book" entered at number two with 74,601 CD copies, and 10,069 download units. "The Book" received a gold certification for physical release by RIAJ. All tracks of the EP except the intro and outro are also certified platinum or higher for streaming by RIAJ. The Book (Yoasobi EP