2 December 1940
From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#216
"The following ships were observed at Pearl Harbor on the 1st: " See doc.
20 December 1940 From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#232
"There was no ship movement in Pearl Harbor on the 19th."
24 December 1940 From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#234
" It is reported that ships from the battleships down returned to Pearl Harbor on Dec. 20th and will stay until Jan. 4 (5th or 6th) on Christmas leave. " See doc.
  (Japanese) POLITICAL STRATEGY
PRIOR TO OUTBREAK
OF WAR (From the
Japanese Monograph
Series.
Part I
Part II
Part III
Part IV
Part V
6 January 1941
From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#002
" Vessels seen in Pearl Harbor on the morning of the 5th were as follows: " See doc.
7 January 1941 From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#003
"Battleships New Mexico (flag), Oklahoma, Idaho, and Mississippi, together with many cruisers and destroyers left Pearl Harbor on the morning of the 6th for training. It is reported that they will return on the 12th(?). " See doc.
9 January 1941 From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#005
" It is reported that the light cruiser Cincinnati returned here from the Philippine Islands. This message sent to Washington and Manila. " See doc.
16 January 1941 From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#011
"1. The capital ships returned to Pearl Harbor immediately. The Pennsylvania arived on the 14th." See doc.
21 January, 1941 From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#014
" The aircraft carriers Lexington and Enterprise together with four destroyers arrived in Pearl Harbor from the mainland on the 21st. " See doc.
28 January 1941 From: Honolulu
(Okuda)
To: Tokyo
(Gaimudaijin)
#018
" Four battleships of the Colorado class and fourteen destroyers arrived in Pearl Harbor from the continent on the 27th. " See doc.