"Kurayami" is the result of the dialogue between Akira Uchida (music) and the acclaimed photographer Masao Yamamoto initiated by IIKKI, between September 2022 and May 2023.

After to have worked as a saxophonist for several years, Akira Uchida, in 2007 learned piano tuning under Mr. Satoshi Yoshida. Planning and holding "Sound workshop" which is to introduce how to interact with various sounds from the viewpoint of sound turning. In 2015 while he was learning from Mr. Masahiro Adachi, Akira Uchida started to create a Clavichord (keyboard instrument), invented in the 14th century.