Tachikawa Hikoki KK (T. Aeroplane Co. Ltd) was originally Ishikawajima, renamed for city where main plant located. This factory expanded 1939-41 from 8,900 to 110,000 m² (about 1.2m sq ft), and during Second World War new factories added at Kofu and Okayama. Produced engines and numerous prototype aircraft, as well as major proportion of trainers (Ki-9/-17/-54/-55). Also important for Ki-36 close-support and for several transports, notably Ki-54 versions, LO (Lockheed licence) and nearly all Nakajima Ki-34. By 1944 prototypes developed of very advanced Ki-70 recon, Ki-74 high-alt recon/bomber, Ki-77 ultra-long-range and Ki-94 and -106 fighters. See also next entry. Though law permitting post-war manufacture of aircraft not published until 15 July 1952, company reformed as Shin Tachikawa Kokuki KK (New T. Aircraft Co. Ltd), with small but new factory at Sunagawa. Here were built Tachihi R-52 (September 1952), first post-war Japanese aircraft, parasol trainer, followed by revised R-53 (155-hp Cirrus Major) and Tachihi R-HM with improved 90-hp Mignet Pou. Subsequently devoted effort to overhaul of US and later JASDF aircraft.