Name Translation: "Morning Calm"
Initial Command Structure:
Ship' Captain: Lieutenant Commander Hanami Kouhei  (prev. C.O. KARUKAYA). Assigned to Desdiv 29 (OITE, HAYATE, ASANAGI, YUNAGI), Desron 6, Fourth Fleet.
29 November-3 December 1941:
Desdiv 29 steamed with Desron 6 from Truk to Kwajalein.
With YUNAGI (2nd section, Desdiv 29), departed Kwajalein, then with Gilbert Islands invasion forces.
With second Wake Island invasion force.
31 December 1941-3 January 1942:
Desdiv 29 escorted convoy from Kwajalein to Truk, then patrol/escort duties out of that base.
With YUBARI and YAYOI, Desdiv 29 escorted KIYOKAWA MARU, two transports and one auxiliary from Truk to join Rabaul invasion force near Mereyon (Woleai).
With Rabaul invasion force, then patrol/escort duties out of that base.
With Gasmata (New Britain) invasion force.
With Lae/Salamua invasion force. Minor damage: in air attacks on 10 March due to strafing; 18 dead, 47 wounded; then to Rabaul on 12 March for emergency repairs.
Escorted YUBARI from Rabaul to Truk.
26 March-1 April:
Steamed from Truk via Saipan to Sasebo, then docked for repairs.
Steamed from Sasebo via Saipan to Truk.
7-8 May: Battle of the Coral Sea
Escorted Port Moresby troop convoy.
Escorted KASHIMA from Rabaul via Kavieng to Truk.
Steamed from Truk to Sasebo, then docked for repairs.
Desron 6 deactivated; Desdiv 29 reassigned to 2nd Surface Escort Division, Fourth Fleet.
Steamed from Sasebo via Saipan to Rabaul.
With Buna invasion force.
Troop transport run to Buna. Light damage: scrapped reef while maneuvering under air attack.
31 July-3 August:
Steamed from Rabaul to Truk, then docked for emergency repairs.
Escorted convoy from Truk to Yokosuka, then docked for repairs.
27 September-10 October:
Escorted convoy from Sasebo via Saipan to Rabaul.
Lieutenant Commander Hanami (to C.O. AKEBONO) relieved by Lieutenant (s.g.) Otsuji Shuuichi .
Steamed from Rabaul to Truk, then Central Pacific convoy escort duties.
Lieutenant Otsuji promoted to Lieutenant Commander.
1 April 1943:
Desdiv 29 deactivated; reassigned directly to 2nd Surface Escort Division, Fourth Fleet.
26 April-16 May:
Escorted convoys from Truk to Yokosuka and back.
Escorted convoy from Truk to Rabaul and back.
Escorted convoy from Truk to Rabaul and back; on 17 June assisted torpedoed transport MYOKO MARU and rescued survivors.
28 June-8 July:
Escorted convoy from Truk to Palau and back.
Accompanied NAKA on troop transport run to Mili.
Out of Truk to assist torpedoed tanker TONAN MARU No. 3, then escorted ISUZU towing tanker back to Truk.
31 July-11 August:
Escorted convoy from Truk via Saipan to Sasebo, then docked for repairs and refitting; on 8 August assisted torpedoed transport NARUTO MARU and rescued 300 survivors.
Departed Yokosuka, escorting convoy to Truk; then escorted collier ASAKAZE MARU towing torpedoed supply ship MAMIYA back to Kure.
Lieutenant Commander Otsuji (to C.O. YUGIRI) relieved by Lieutenant Commander Onishi Yoshiharu .
Escorted ASAKAZE MARU from Yokosuka to Truk.
Escorted convoys from Truk to the Bonins and Saipan and back.
2nd Surface Escort Division reassigned to General Escort Command.
Escorted convoy from Truk to Rabaul and back. Minor damage: on 20 November due to air attack near Rabaul; then emergency repairs at Truk.
Escorted convoys from Truk to Rabaul and back.
2-14 January 1944:
Departed Truk, escorting convoy to Yokosuka. On 10 January assisted torpedoed repair ship YAMABIKO MARU, then escorted cargo ship YAMAKUNI MARU towing her back to Japan. YAMABIKO MARU sank on 12 January; YAMAKUNI MARU torpedoed and sank on 14 January; arrived Yokosuka with survivors same date, then docked for upkeep.
14 February-17 March:
Escorted convoys from Yokosuka to the Bonins, Marianas, Palau and back.
Escorted troop convoy from Yokosuka to Saipan and back.
Escorted troop convoy from Yokosuka to Saipan.
Departed Saipan, escorting convoy to Japan. Sunk: torpedoed by USS POLLACK (SS-180) 200 miles west-northwest of Chichi-jima; sank in 40 minutes. 82 killed in sinking; number of survivors unknown, but probably high, including Lieutenant Commander Onishi (to C.O. UME).
10 July 1944:
Removed from Navy List.