Germany, Italy, and Japan were the 3 countries in the infamous Axis during WWII. They were allies. However, it wasn't the same during WWI which was merely two decades earlier. During WWI, Italy in fact fought against Germany while they were allies. Japan attacked and took over German colony - Qingdao in China during the time Germany was unable to send reinforcement there. Thus, both countries were in fact not only enemies of Germany, but they were also quite treasonous considered the circumstances. In fact, when one of the Chinese high official visited Germany and reminded them what Japan did during WWI, Hitler answered that he considered Japan as the Italy of Far East (which means they both couldn't be trusted. He was referring to the Italy's betrayal in WWI, since Japan almost the same, they are one of the same kind). Then what made Hitler to sign the pack with those two countries he considered he shouldn't be trusting?