TheCodeBreakers
time had been thought to be in northern China. But its greatest feat was
the discovery of a huge concentration of Japanese air strength in
Hollandia. The 5th Air Force launched massive raids and destroyed more
than 100 enemy planes. Consequently they were not present to attack
the American invaders, who splashed ashore with virtually no opposition.
The Imperial Japanese Navy had commenced its crypt-analytic efforts
in 1925 with the creation of an ultra-secret Tokumu Han ("Special
Section") in the 4th, or communications, Department of the Naval
General Staff. It then numbered six persons, including clerks, and was
located in the red brick Navy Ministry building in Tokyo. Among its early
members were the young naval officer Hideya Morikawa, nephew of Chief
of Staff Admiral Kanji Kato, and Morikawa's former superior, First
Lieutenant Kamisugi, who had handled cryptography aboard the flagship
Nagato
annaabi.ee 
