Japanese, in my view, is easy to pick up.. ie. the early stages of your
Pidgin Japanese shouldn't be too difficult, if you're a native English speaker. The phonetics are not hard and the basic words necessary for essential communication are not too complex.
In later stages you will come across more and more
polysyllabic words. This is because of the limited phonetics in the language. Hawaiian is another such language.
As you start to learn more words and make sentences the most challenging concept with Jp (Japanese) is that it is a
head last language.
eg. one might say:
Eng: I'm going to the shop, with Tom, at 6.
Jp: with Tom, at 6, to the shop, [I] am going.
Eng: I'll get that, and that, and those, and this. (for instance ordering food)
Jp: that and, that and, those and, this I'll get.
In the next post I'll get a little grittier :)