The destroyer again sailed with the carriers on 11 February, and conducted strikes on Tokyo on 16–17 February, in preinvasion support of the Allied attack on Iwo Jima. After inflicting considerable damage to Japanese air power, "John W. Weeks" steamed toward Iwo Jima to give direct support to Marines fighting for the island. Later that month, the carriers renewed their attacks on the enemy's home islands. Heavy raids during March continued to cripple the enemy's power, and the destroyer received credit for two assists as five enemy planes were splashed while attempting a raid on the Task Force.