Sony Interactive Entertainment Japan Studio is a Japanese first-party video game production and development arm of the parent company Sony Interactive Entertainment, most well known for the Ape Escape, LocoRoco, Patapon, Gravity Rush, and Knack series, among other titles. Some of the studios that were part of SIE Japan Studios were: Polys Entertainment (Gran Turismo), Team Asobi (Astro Bot), Team Ico (Ico and Shadow of the Colossus, closed) and Project Siren (Siren and Gravity Rush, merged into Bokeh Game Studios). In a statement, Sony stated that, as of 1 April 2021, Japan Studio would be re-centered around Team Asobi to build on the popularity of Astro's Playroom.

Acquire Corp. (株式会社アクワイア, Kabushikigaisha Akuwaia) is a Japanese video game developer and publisher, mainly known for their Tenchu and Way of the Samurai series.

Acquire was founded on December 6, 1994, and in 1998 developed Tenchu: Stealth Assassins for the PlayStation, which turned into a franchise. The developer pushed for a more sandbox approach to the level design, which found its way in other Acquire titles like Way of the Samurai and Shinobido: Way of the Ninja.

In 2011, the company was acquired by GungHo Online Entertainment. Acquire co-developed Octopath Traveler with Square Enix, releasing in 2018. Acquire was chosen as development partner for the game based on their affinity with pixel-art and prior work on the What Did I Do to Deserve This, My Lord? series. Acquire developed Katana Kami: A Way of the Samurai Story, which released in 2020, following the cancellation of a fifth Way of the Samurai entry.

In 2024, the company was acquired by Kadokawa Corporation.