USNI News – The Japan Ground Self-Defense Force last week formally activated the 3rd Regiment of its Amphibious Rapid Deployment Brigade, a key element of Japan’s plan to defend its southwest region and the outlying islands there. Last month Japan also stood up a JGSDF electronic warfare unit on Yonaguni Island and a surface-to surface-missile unit on Okinawa – the first time this type of unit has deployed on Okinawa.