| Forces | - Fletcher (TF 17 and overall command): 2 carriers, 5 heavy cruisers, 9 destroyers, 39 fighters, 71 dive bombers, 26 torpedo planes.
- Crace (detached on May 7th for a raid to the Louisiades): 2 heavy cruisers, 1 light cruiser, 2 destroyers.
- Philips (TG 17.6, logistic group): 2 destroyers, 2 oilers.
- DeBaun (TG 17.9, exploration group based at Noumea): 1 seaplane tender, 12 seaplanes.
Total: 2 carriers, 7 heavy cruisers, 1 light cruiser, 13 destroyers, 1 seaplane tender, 2 oilers, 39 fighters, 71 dive bombers, 26 torpedo planes, 12 seaplanes | - Takagi (striking force): 2 carriers, 2 heavy cruisers, 6 destroyers, 38 fighters, 43 dive bombers, 42 torpedo planes.
- Goto (distant cover of the convoys to Tulagi and Port Moresby): 1 light carrier, 4 heavy cruisers, 1 destroyer, 1 oiler, 12 fighters, 6 torpedo planes.
- Marumo (close cover of the convoy to Port Moresby): 2 light cruisers, 1 seaplane tender, 3 gunboats.
- Kajioka (escort the convoy to Port-Moresby): 1 light cruiser, 5 destroyers, 1 escort or patrol boat, 1 auxiliary ship.
- Abe (convoy to invade Port-Moreby): 1 mine laying cruiser, 12 transports.
- Logistic (Takagi's logistic group): 1 destroyer, 1 oiler.
Total: 2 carriers, 1 light carrier, 6 heavy cruisers, 3 light cruisers, 13 destroyers, 1 seaplane tender, 1 escort or patrol boat, 3 gunboats, 1 mine laying cruiser, 1 auxiliary ship, 12 transports, 2 oilers, 50 fighters, 43 dive bombers, 48 torpedo planes |