On 8 March 2023, the official Twitter of Frieren: Beyond Journey’s End revealed that 8 million copies of the manga have been printed (physically) and sold (digitally).
In September 2022, the count was 7.2 million. The official Twitter account for the series released the official cover for the tenth volume of the manga as well.
— 『葬送のフリーレン』公式 (@FRIEREN_PR) March 8, 2023
The tenth volume of the manga will be released on March 16. The 8 million copies also include the first prints of the new volume.
Frieren: Beyond Journey’s End is written by Kanehito Yamada and illustrated by Tsukasa Abe.
The manga was serialized in Shogakukan’s Weekly Shonen Sunday magazine on April 28, 2020. English version of the manga is published by Viz Media.
Viz Media describes the first volume as follows:
Decades after their victory, the funeral of one of her friends confronts Frieren with her own near immortality.
Frieren sets out to fulfil the last wishes of her comrades and finds herself beginning a new adventure…
Source: Official Twitter