Imperial Japanese Navy Combined Fleet
    Admiral Yamamoto Isoroku

Fifth (Northern) Fleet
    Vice Admiral Hosogaya Boshiro

Cruiser Division 21
CA Nachi (F) (Myoko Class)
    Damaged by five shell hits, 14 killed, 27 wounded
CA Maya (Improved Takao Class)
    Temporarily detached from Cruiser Division 4
CL Tama (Kuma Class)

Destroyer Division 21
DD Hatsushimo (Hatsuharu Class)        CDR Iritomo Atsuo
DD Wakaba (Hatsuharu Class)              LCDR Kuroki Masakichi

D Convoy
    Rear Admiral Mori Tomoichi (Commander Destroyer Squadron One)

CL Abukuma (F) (Nagara Class)
    RADM Mori

Destroyer Division 6
Inazuma (Akatsuki Class)                        LCDR Terauchi Masamichi
Ikazuchi (Akatsuki Class)                         LCDR Maeda Saneho

Asaka Maru (“fast transport”)
Sakito Maru (“fast transport”)
 

Second Escort Force
DD Usugumo (Fubuki Class)                   LCDR Ikeda Shunsaku

Attached directly to Fifth Fleet
Sanko Maru (IJA chartered “slow transport”)
Limited to 10 knots
Cargo: food, ammo, building materials.

United States Navy
    Commander in Chief, Pacific Ocean Areas—Admiral Chester W. Nimitz

Task Force 16
    Rear Admiral Thomas C. Kinkaid

Task Group 16.6
    Rear Admiral Charles H. “Soc(rates)” McMorris

Cruiser Division 1
    Rear Admiral McMorris

CA25 Salt Lake City (Pensacola Class)        Captain Bertram J. Rodgers
    XO CDR Worthington S. Bitler
    Equipped with SG radar
    Temporarily detached from Cruiser Division 5
    Damaged by four shells and near misses

CL 9 Richmond (F) (Omaha Class)                Captain Theodore Waldschmidt
    Equipped with SG radar

Destroyer Squadron 14
    Captain Ralph Riggs, USN
DD 492 Bailey (F) (Benson Class)                LCDR John Atkeson
    Struck by two shells
DD 606 Coghlan (Benson Class)                  CDR Benjamin Tompkins
DD 353 Dale (Farragut Class)                       CDR Anthony Rorschach
    XO LCDR Ken Robinson
    Equipped with SG radar
DD 354 Monaghan (Farragut Class)             LCDR Peter Horn
    XO LCDR Hart Kait
    Equipped with SG radar

Sources:
1. The Battle of the Komandorski Islands by John A. Lorelli, N.I.P., 1984.
2. Japanese Cruisers of World War II by Eric LaCroix and Linton Wells II, N.I.P., 1997.
3. Cruisers of the U.S. Navy, 1922-1962 by Stefan Terzibaschitsch, N.I.P., 1984.
4. Japanese Warships of World War II by A.J. Watts, Ian Allan LTD, 1966.
5. Nihon Kaigun web site
6. Battle History of the Imperial Japanese Navy 1941-45 by Paul S. Dull, N.I.P., 1978.