Private company

Project Siren

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.

Overview

2004Founded1

Corporate structure

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.

The story

Founded by Keiichiro Toyama in 2004.1

Leadership

Who has led Project Siren, and when. Pick a name to see everywhere that person has worked.

Subsidiaries and ownership

Parent company

Owners

From Wikidata.1

Timeline

  1. 2004Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2