REUTERS
Japan's Izumo 'helicopter destroyer' is a flat topped
The ship is designed to carry several helicopters, can be fitted for vertical lift off F-35Bs, and it's also worth mentioning that ships like the Izumo can be retrofitted for linear take-off fighter jets, should the need arise.
Japan's careful language is meant to fit a constitutional ban on offensive military assets, since a destroyer can be defensive but an aircraft carrier is clearly offensive.
From South
Maritime Self-Defence Force chief of staff Admiral Keiji Akahoshi stated in 2009 that the Hyuga-class falls outside the conventional definition of an aircraft carrier because it lacks a fair degree of offensive functions. This argumentation has been notably employed by the Japanese government to circumvent Article 9 of the peace constitution to portray its helicopter destroyers as purely defensive military assets.
Destroyer or not, the Hyuga-class warship certainly extends Japan's projection of military power, and Chinese officials wasted no time speaking out about it.
First, the obvious, from China Daily:
"It is an aircraft carrier, and Japan just called it 'a helicopter destroyer' to downplay it's aggressive nature," said Zhang Junshe, a senior researcher at the People's Liberation ArmyNaval Military Studies Research Institute. Japan, defeated in World War II, is creating regional tensionsby breaking the postwar order, he added.
China also released a press statement:
“We are concerned over Japan’s constant expansion of its military equipment. Japan’s Asian neighbors and the international community need to be highly vigilant about this trend. Japan should learn from history, adhere to its policy of self-defense and abide by its promise to take the road of peaceful development.”
In naming the Izumo, Japan asked for this type of attention from China, and perhaps that was the purpose.
The Izumo was the name of the ship that began the invasion of China in 1937.