This month's discoveries came after weeks of searching by crew members based on the research vessel Petrel. The vessel is owned by Vulcan Inc, a company created by the late Microsoft co-founder Paul Allen.
One ship, the Kaga, was discovered last week, while wreckage from another carrier, Akagi, was found on Sunday, Vulcan Inc. said in a press release.
"Every shipwreck we find reminds us all of the ultimate sacrifice made by those who served their countries," said Robert Kraft, Vulcan Inc.'s director of undersea operations, in a press release. "Our team is truly honored to have discovered the Japanese Flagship Carrier, Akagi."