|Parent company / owner||Nintendo of America|
|Divisions / Subsidiaries||N/A|
Treehouse is Nintendo of America's internal product development division. Based in a secluded, high-security office within Nintendo of America's Redmond headquarters, the Treehouse handles product management, quality assurance, and translation and localization for Nintendo's games, and is the audio-visual department that puts together game trailers.
The Treehouse was founded in the mid-1990's in response to the generally poor translations of many NES and early SNES titles. The codename "Treehouse" originates from Donkey Kong Country, referring to Donkey Kong's home; the team working on the game was isolated from the rest of Nintendo to preserve the game's secrecy, and as the team expanded afterward the name was kept. For games that do not have as much text to translate, the Treehouse is involved later in development, but when translating larger titles, the team works with the Japanese developers earlier on, as the game is being worked on. The Japanese developers also speak with the Treehouse to determine if particular elements of a game are too specific to Japanese culture, so that Nintendo's games can maintain an "international" feel.
Ever since E3 2014, the Treehouse has occasionally hosted livestreams to showcase upcoming and recently released games.