FYI - There was a live patch on May 1 which added 2 limited time weekly quests which will be removed in the late May patch.

[2405 B1] Anti-submarine sweep operation
Have 3 (DD + DE) in fleet. Get S (A?) rank in 1-5 three times. Reach 1-6 resource node one time.
Rewards:350 fuel, 400 bauxite. Choose: 3x Bucket OR 850 fuel. Next Choose: 6x Devmat OR 2x Screw

[2405 B2] Powerful kaiboukan, emergency coastal defense!
Have DE as flagship. Have additional 2 DE in fleet. Get S (A?) rank in 1-1, 1-2, 1-3, 1-5, 2-1 one time each.
Rewards:250 fuel, 150 ammo, 300 bauxite. Choose: 2x Irako OR 1x Mamiya OR 7x Devmat. Next Choose: 8x Bucket OR 2x Armament Material OR 1x Medal.