Re: does aikido have arm and wrist locks?
Now for the annoying it depends statement...
simply put, yes, aikido has multiple joint locks in it's syllabus. however, there are some groups who do joint-locks more than others... there are some people who would argue that techniques are done solely by getting a joint lock, then putting the pain on until the guy jumps. there are some groups who kinda approach the opposite end and say if a lock happens, great, that's one more tool to use but neither depend on them or actively seek them. but those are the two extremes
for a gross overstatement, I'd say the majority of the aikido world does use joint locks as a major portion of their practice.