Zero-G

Zero-G (株式会社ゼロジー) is a Japanese animation studio founded in June 2011 by veteran anime director Negishi Hiroshi. The studio is located in Suginami, Tokyo.

The studio is separate from Negishi’s prior studio Zero-G Room, which was established in 1991 and was later shut down in 2001 when it merged with Radix to become Radix Ace Entertainment.
*wikipedia