By 
Japan is pursuing a mix of imported, indigenous and cooperatively developed technologies to beef up its defenses as China, North Korea and Russia flex their muscles with various new weapon systems, a Japanese defense official said Dec. 19.Japan faces an “increasingly severe” security environment, said Hirokazu Hokazono, deputy commissioner and chief defense scientist for the Japanese Ministry of Defense’s Acquisition, Technology & Logistics Agency (ATLA). China is developing the J-20 next-generation fighter, GJ-1 Yilong attack unmanned aircraft and Dong-Feng 21…
