The story
Founded by Keiichiro Toyama in 2004.1
Private company
Logo: Rezatokyo, CC BY-SA 3.0, via Wikimedia Commons2
Project Siren is a Japanese video game developer based in Tokyo, founded in 2004.1 It was founded by Keiichiro Toyama.1 It is part of Sony Group.1
Last updated Oct 21, 2026.
Project Siren is part of a group headed by Sony Group. 277 entities, 30 countries on record. Switch between the flow chart and the network, and select any entity to see its details.
Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.
Founded by Keiichiro Toyama in 2004.1
Who has led Project Siren, and when. Pick a name to see everywhere that person has worked.
From Wikidata.1
The numbers on this page point here. Each one links to the record it came from.