[3] Pre-registration of the Japanese version of Touhou LostWord began in July 2019,[7] and the game was released in Japan on April 30, 2020.

[10] The game's opening song, "Lost Word Chronicle", was performed by Kanako Itō, and had been watched over 5 million times on YouTube by May 2021.

[5] Other musicians who have performed for Touhou LostWord include Toshihiko Tahara,[11] nano, and Kishida Kyoudan & The Akeboshi Rockets.

[12] Touhou LostWord was a runner-up in the 2020 Google Play 'Exciting' award, losing to Dragon Quest Tact.

[13] On June 3, 2021, TouchArcade listed Touhou LostWord as one of the best App Store games released the previous week.