Were the Japanese aircraft carriers during World War II real aircraft carriers?

Japan’s aircraft carriers during World War II were genuine aircraft carriers, especially the Shinano, which was built near the end of the war and had a displacement of more than 60,000 tons. In the early days of the war, Japan's main force used to counter the United States was its aircraft carrier fleet (although Japan later gradually shifted its focus to battleships and aircraft carriers became auxiliary). I'm not sure what type of "quasi-aircraft carrier" you refer to, but according to the classification during World War II, in the U.S. Navy, there are fleet aircraft carriers and escort aircraft carriers. Fleet aircraft carriers are mainly responsible for the control of air superiority over the fleet and attacks on sea and land. Escort aircraft carriers (perhaps what you call quasi-aircraft carriers) are usually used to escort merchant ships or undertake tasks such as reconnaissance and target designation in battle. The number of escort aircraft carriers built greatly exceeds that of fleet aircraft carriers because their costs are lower and many of them are converted from merchant ships. Escort aircraft carriers and fleet aircraft carriers are similar in structure. They both have the "flat deck" characteristics of World War II aircraft carriers. However, perhaps because most of them are converted from merchant ships, the superstructure of escort aircraft carriers is much smaller than that of fleet aircraft carriers. The number of aircraft carried by an escort aircraft carrier ranges from more than 10 to more than 30 aircraft, which is not too many. It is naturally different from a fleet aircraft carrier that often carries dozens of fighter aircraft.