The original eneloop was designed and developed by a battery factory in Takasaki, Japan. That factory and the Eneloop brand were both owned by Sanyo, but in 2009 things changed. Panasonic bought the Eneloop brand, while Fujitsu, as part of its FDK subsidiary, owned the factory and all the IP associated with the manufacture of LSD batteries.
In other words, there is only one factory currently in Japan that can make Low Self-Discharge nickel-metal hydride batteries (LSD Ni-MH) and that is FDK. FDK is an OEM manufacturer for other brands, Like Amazon, Fujitsu, Panasonic, and IKEA. All those brands including Panasonic Eneloop are the same rebranded battery.