Why did the Imperial Japanese Army have aircraft carriers? That seems a bit ridiculous.
They had FOUR FUCKING CARRIERS to be precise:
The Akitsu Maru, which has the dubious honor of being the sunken carrier with the worst loss of lives of all time:
The Kumano Maru
The Yamashio Maru
And the Nigitsu Maru, which may or may not have actually been a carrier, as all of them where converted cargo ships.
As for why? Basically, the ridiculous rivalry between the army and the navy, mostly due to budget and political influence affairs, which not only led to this, but also, among other things, both service developing and operating aircraft of their on, AND BOTH OF THEM DEVELOPING AND OPERATING TANKS!
A bureaucratic nightmare that all it achieved was wasted precious resources, and in a positive way, at least for us, contribute to the defeat of Japan.