The Science Fiction and Fantasy Writers of Japan (SFWJ) announced the 44th Japan SF Grand Prize winners on February 19:  

The 44th Japan SF Award is given to the most outstanding science fiction work published between September 1, 2022 and August 31, 2023.

The winner is:

• Protocol of Humanity by Satoshi Hase (Hayakawa Shobo)

Also, SFWJ posthumously honored four persons with the 44th Japan SF Grand Prize Contribution Award:

• Takashi Ishikawa (critic)
• Aritsune Toyota (writer)
• Yuki Sei (manga artist)
• Leiji Matsumoto (manga artist)

The grand prize-winning work receives a certificate and trophy as the main prize, and a cash prize of 1 million yen as the supplementary prize. 

The members of the prize selection committee were Haruna Ikezawa, Masahiko Inoue, Hitoshi Kusakami, Yūki Shansendō, and Toya Tachihara. The eligibility period for the prize ran from September 1, 2022 and August 31, 2023.

The award ceremony will be held on April 27, 2024. 

The Science Fiction and Fantasy Writers of Japan (Japanese official name: 日本SF作家クラブ, Nihon SF Sakka Club) is an organization of science fiction and fantasy-related people, professional or semi-professional.

[Based on a press release.]