Number |
Direction |
Imari Bay[2] |
Singapore[2] |
Notes |
Hi-1 |
South |
10 July 1943 |
19 July 1943 |
|
Hi-2 |
North |
3 August 1943 |
23 July 1943 |
|
Hi-3 |
South |
19 July 1943 |
1 August 1943 |
Attacked by USS Sawfish on 22 July[3] |
Hi-4 |
North |
15 August 1943 |
5 August 1943 |
|
Hi-5 |
South |
7 August 1943 |
19 August 1943 |
|
Hi-6 |
North |
3 September 1943 |
24 August 1943 |
|
Hi-7 |
South |
25 August 1943 |
6 September 1943 |
|
Hi-8 |
North |
21 September 1943 |
11 September 1943 |
|
Hi-9 |
South |
10 September 1943 |
|
Terminated 21 September 1943 at Cape Saint Jacques |
Hi-10 |
North |
9 October 1943 |
|
Originated 28 September 1943 at Cape Saint Jacques |
Hi-11 |
South |
25 September 1943 |
4 October 1943 |
|
Hi-12 |
North |
21 October 1943 |
10 October 1943 |
|
Hi-13 |
South |
12 October 1943 |
30 October 1943 |
|
Hi-14 |
North |
16 November 1943 |
3 November 1943 |
Attacked by USS Bluefish on 8 November[4] |
Hi-15 |
|
|
|
Did not sail[2] |
Hi-16 |
|
|
|
Did not sail[2] |
Hi-17 |
South |
28 October 1943 |
11 November 1943 |
|
Hi-18 |
North |
28 November 1943 |
15 November 1943 |
|
Hi-19 |
|
|
|
Did not sail[2] |
Hi-20 |
|
|
|
Did not sail[2] |
Hi-21 |
South |
20 November 1943 |
14 December 1943 |
|
Hi-22 |
|
|
|
Did not sail[2] |
Hi-23 |
South |
1 December 1943 |
14 December 1943 |
|
Hi-24 |
North |
4 January 1944 |
19 December 1943 |
|
Hi-25 |
South |
11 December 1943 |
21 December 1943 |
|
Hi-26 |
North |
|
26 December 1943 |
|
Hi-27 |
South |
21 December 1943 |
2 January 1944 |
Attacked by USS Flying Fish on 27 December[5] |
Hi-28 |
North |
17 January 1944 |
8 January 1944 |
|
Hi-29 |
South |
31 December 1943 |
15 January 1944 |
|
Hi-30 |
North |
12 February 1944 |
19 January 1944 |
|
Hi-31 |
South |
11 January 1944 |
20 January 1944 |
|
Hi-32 |
North |
4 February 1944 |
25 January 1944 |
|
Hi-33 |
South |
10 January 1944 |
23 January 1944 |
|
Hi-34 |
North |
10 February 1944 |
27 January 1944 |
|
Hi-35 |
|
|
|
Did not sail[2] |
Hi-36 |
|
|
|
Did not sail[2] |
Hi-37 |
South |
20 January 1944 |
29 January 1944 |
|
Hi-38 |
North |
13 February 1944 |
2 February 1944 |
|
Hi-39 |
South |
26 January 1944 |
9 February 1944 |
|
Hi-40 |
North |
|
13 February 1944 |
Dispersed 24 February under attack by USS Jack and Grayback[6] |
Hi-41 |
South |
1 February 1944 |
11 February 1944 |
|
Hi-42 |
North |
28 February 1944 |
16 February 1944 |
|
Hi-43 |
South |
11 February 1944 |
3 March 1944 |
|
Hi-44 |
|
|
|
Did not sail[2] |
Hi-45 |
South |
16 February 1944 |
27 February 1944 |
|
Hi-46 |
|
|
|
Did not sail[2] |
Hi-47 |
South |
21 February 1944 |
5 March 1944 |
Attacked by USS Bluefish on 4 March[7] |
Hi-48 |
North |
25 March 1944 |
11 March 1944 |
Attacked by USS Lapon on 18 March[8] |
Hi-49 |
South |
23 February 1944 |
11 March 1944 |
|
Hi-50 |
North |
8 April 1944 |
15 March 1944 |
|
Hi-51 |
|
|
|
Did not sail[2] |
Hi-52 |
|
|
|
Did not sail[2] |
Hi-53 |
South |
8 March 1944 |
18 March 1944 |
|
Hi-54 |
North |
|
29 March 1944 |
Merged with Hi-56 |
Hi-55 |
South |
19 March 1944 |
3 April 1944 |
Attacked by USS Hake on 2 April[9] |
Hi-56 |
North |
24 April 1944 |
8 April 1944 |
Merged with Hi-54 |
Hi-57 |
South |
3 April 1944 |
16 April 1944 |
1 April departure delayed by storm |
Hi-58 |
North |
3 May 1944 |
21 April 1944 |
Submarine USS Robalo seen by aircraft from Japanese aircraft carrier Kaiyō and damaged by convoy escort 24 April 1944 |
Hi-59 |
South |
20 April 1944 |
|
Terminated 2 May 1944 at Manila |
Hi-60 |
|
|
|
Did not sail[2] |
Hi-61 |
South |
3 May 1944 |
18 May 1944 |
|
Hi-62 |
North |
8 June 1944 |
23 May 1944 |
|
Hi-63 |
South |
13 May 1944 |
27 May 1944 |
Attacked by USS Raton on 24 May[10] |
Hi-64 |
North |
15 June 1944 |
6 June 1944 |
|
Hi-65 |
South |
29 May 1944 |
12 June 1944 |
Attacked by USS Guitarro and Picuda on 2 June[11] |
Hi-66 |
North |
26 June 1944 |
17 June 1944 |
|
Hi-67 |
South |
22 June 1944 |
9 July 1944 |
Attacked by USS Bang on 29 June[12] |
Hi-68 |
North |
3 August 1944 |
14 July 1944 |
Attacked by USS Angler, Flasher and Crevalle on 26 July[13] |
Hi-69 |
South |
13 July 1944 |
31 July 1944 |
|
Hi-70 |
North |
4 August 1944 |
15 August 1944 |
|
Hi-71 |
South |
8 August 1944 |
1 September 1944 |
Attacked by USS Rasher, Spadefish, Redfish, Bluefish, Haddo and Harder[citation needed] |
Hi-72 |
North |
28 September 1944 |
6 September 1944 |
Attacked by USS Growler, Pampanito and Sealion on 12 September[14] |
Hi-73 |
South |
25 August 1944 |
5 September 1944 |
|
Hi-74 |
North |
23 September 1944 |
11 September 1944 |
Attacked by USS Barb on 16 September[15] |
Hi-75 |
South |
8 September 1944 |
22 September 1944 |
Attacked by USS Flasher on 18 September[16] |
Hi-76 |
North |
26 October 1944 |
2 October 1944 |
Hi-76A departed Singapore 12 October[2] |
Hi-77 |
South |
1 October 1944 |
12 October 1944 |
Attacked by USS Whale, Seahorse, Hawkbill and Baya on 6 and 7 October[17] |
Hi-78 |
North |
2 November 1944 |
20 October 1944 |
|
Hi-79 |
South |
26 October 1944 |
9 November 1944 |
Subsidiary Hi-79A formed on 6 November 1944[2] |
Hi-80 |
North |
2 December 1944 |
17 November 1944 |
|
Hi-81 |
South |
14 November 1944 |
4 December 1944 |
Attacked by USS Queenfish, Picuda and Spadefish on 15 and 17 November[18] |
Hi-82 |
North |
9 January 1945 |
12 December 1944 |
Attacked by USS Flasher on 22 December[19] |
Hi-83 |
South |
25 November 1944 |
13 December 1944 |
Attacked by USS Pipefish on 3 December[20] |
Hi-84 |
North |
13 January 1945 |
26 December 1944 |
|
Hi-85 |
South |
19 December 1944 |
|
Terminated 4 January 1945 at Cape Saint Jacques |
Hi-86 |
North |
10 February 1945 |
|
Originated 9 January 1945 at Cape Saint Jacques; attacked by Task Force 38 on 12 January[21] |
Hi-87 |
South |
31 December 1944 |
23 January 1945 |
Attacked by Task Force 38 on 16 January[22] |
Hi-88 |
North |
March 1945 |
20 January 1945 to 18 March 1945 |
Sailed as ten independent small convoys;[2] Hi-88H attacked by USS Hammerhead on 23 February, and Hi-88I by USS Blenny and Baya on 20 and 21 March[23] |
Hi-89 |
South |
24 January 1945 |
8 February 1945 |
|
Hi-90 |
North |
4 March 1945 |
15 February 1945 |
|
Hi-91 |
South |
26 January 1945 |
8 February 1945 |
|
Hi-92 |
North |
11 March 1945 |
18 February 1945 |
Attacked by USS Hoe on 25 February[24] |
Hi-93 |
South |
29 January 1945 |
12 February 1945 |
|
Hi-94 |
North |
14 March 1945 |
23 February 1945 |
|
Hi-95 |
South |
31 January 1945 |
14 February 1945 |
|
Hi-96 |
North |
22 February 1945 |
13 March 1945 |
Attacked by USS Blenny on 27 February[24] |
Hi-97 |
South |
7 February 1945 |
15 February 1945 |
|
Hi-98 |
North |
|
27 February 1945 |
Single ship convoy Ryoei Maru sunk by USS Bashaw[25] |