Written by KOJIMA Misao, to his mates at the Aomori Marine Products Testing Lab in Aomori city.
I can't make out all of it. He is talking about the hot weather where he his, and it says he is doing fine.
The censor's marks just mean that the contents were checked, and they passed the censor's approval. (No doubt it passed because he's just talking about the weather and nothing sensitive).
Postcard is a 2 sen postcard (1937-1945). Postmark is August 15, 1942.