Published by OneSwitch.org.uk Saturday, 5 December 2015 9:57 am.
The Gundam Online Zaku controller is a USB PC compatible one handed device. It has nine buttons and an analogue thumb stick that can be easily reconfigured using JoyToKey.
It can be used on game consoles via a Titan One adapter through a Windows PC. Hunt for it on-line using "専用ザク・コントローラー同梱" and use JAA to import one to your country if outside of Japan.
Images via various Japanese sites (1, 2, 3). Added to the One Switch Accessible Gaming Shop.