The Mainichi reported on Jan. 6 that a proposal to convert the JS Izumo helicopter destroyer into a carrier capable of operating fixed-wing fighters is being circulated within the Defense Ministry.
By Kaijō Jieitai （海上自衛隊 / Japan Maritime Self-Defense Force） (http://www.mod.go.jp/msdf/formal/jmp/201612.html) [CC BY 4.0], via Wikimedia Commons
However, the proposal is unlikely to be adopted as its against the government’s policy not to have offensive capabilities.