Question About Japanese WWII Military Stationery

Hey all, I've come across these two items of what I believe are Japanese military postal stationery from the late 1930's to World War II era. Could be Chinese? I could be completely offbase, but since I don't know the language there's not much to go on. Asia Hotel won't get any valid Google searches I would think. Does anyone know anything else about them? What the commemorative handstamps are about? Thanks, Will

The Asia Hotel stamp is Japanese alright. The Japanese text doesn't add much, except what appear to be telephone numbers.

The second and fourth are indeed military mail postcards.

The stamp on the third has me intrigued. It's inscribed (probably) 'Asahi Hotel' 'In front of the Hsinking Railway Station' and 'Commemoration' at bottom. Hsinking was the new name given to Changchun, when it was made the capital of Manchukuo. The name of the city has since reverted to Changchun. The peasant smoking the pipe and the pigs are certainly Chinese, not Japanese.

So this is a Japanese Army in Manchuria card. I've no idea how common or otherwise the card is, but I'd think it would make a nice addition to a collection of Manchukuo.

The second and fourth pictures are the backs of the first and third pictures. Thanks for the information. It concurs with something other information another helped me with through facebook. I did find out the first one is from Harbin which was also part of Manchukuo. In my own research it seems the Japanese military was fond of using hotels as military headquarters during the war. Harbin was home to the infamous Unit 731. That unit did some of the worst things in human history.