[1] Some sources - apparently erroneously - state Unryu was with the Oyodo force that night. But her own TROM survives for the month of October and the carrier's movements all appear to be in the Inland Sea with no indication of return trip (why would she?) to Yokosuka. With the actual trip south for the carrier from Yokosuka shortly before at end of September, it seems likely this was cause for confusion.

[2] It is noteworthy the stunned Japanese survivors thought the hits came from port because of the capsize. USS Cavalla's report noted that she fired from the starboard beam and at the time of attack Shimotsuki and Momo were steaming on course 070 at a cruising pace of 15 knots, with Momo 1,000 yards abeam to port of Shimotsuki. Cavalla observed the first hit at 0448 one minute forty seconds after firing with first "amidships. Eight seconds later the second hit just aft of amidships, the third hit on the bow, and the fourth hit on the stern, all hits about 8 seconds apart." The first two hits causing a tremendous explosion and the target starting to buckle in the middle. It sank in pieces inside two minutes. Momo initially searched for the submarine attacker with her new Type 4 hydrophones, but had failed to realize the culprit had brazenly remained on the surface and that the attack had come from the east, not the west. - (Tully)

[3] The damage profile of the wreck gives striking confirmation of Cavalla's observations and tends to confirm all four torpedoes hit Shimotsuki. Not only that, if the report is taken at face value when merged with the mute testimony of the wreck it provides a vivid if grim picture of the destroyer's last moment. The first torpedoe hit under the bridge dangerously buckling the hull just as a similar hit on sister-ship Akizuki had done. The second torpedo detonated under the mainmast breaching the large aft engine room space and in so doing created another hinge point in the hull. The third hit was the most terrible---tearing out the whole starboard bow area abaft the prow and killing hundreds of sailors asleep in their bunks. The fourth hit was hardly less destructive, smashing into the destroyer aft of No.3 turret and severing the entire fantail from the main body of the ship. Incredibly, what did not happen is her torpedo mount explode. Its intact in the wreckage. Furiously afire and flooding massively, Shimotsuki keeled over to port opposite the side struck and sank bodily to the sea floor within two minutes or less. The severed stern followed her down.

[4] According to a modern Japanese source ("High-angle gun and air defense destroyers" by Akira, Endo. Hara Shobo press 1975) only 46 survivors were rescued by Momo; everyone else aboard including the whole Desron 31 staff perished.The wreck of Shimotsuki was discovered 6 July 2002. The information confirms three of the torpedo hits and that Shimotsuki was blasted apart (though her torpedoes did not explode)and plummeted to the bottom so fast she landed on the opposite side.- (Tully)

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