What are some of the differences? Obviously, hapkido is korean; jujitsu is japanese. Technique differences? Is one more "sporty" than the other?
What are the distinguishing traits?

Are both effective in a real situation? Would both effectively complement my TKD training?

Hapkido is maid up of mostly of pressure points, joint locks, and kicking. Whereas Jujitsu (from what I know of) is made up mostly of circular joint locks. I currently study Hapmudo, which implements key aspects of both Hapkido and Jujitsu, as well as the key aspects of 7 other martial arts. I think you should try and learn the most you can from what is available to you.

I cant speek for JJ, but HKD has more than just kicking, pressure points, and joint locks. We cover the entire range of fighting. We have devestating strikes as well. On the inside we work elbows and knees as much as the different ways of punching. As well, the throws and takedowns are great to. A must in all HKD is finishing techniques. We never just do a tech. and step back. We are taught to always use a finishing tech. using appropriate level of force.

I don't know too much about TKD but I tend to think of it as more of a long range system, that is you generally like to operate at just within leg reach of the bad guy most of the time.

I think jujutsu is definately a more close in type of system. I guess you could call traditional jujutsu a 'close to medium range' type of combat system, but it really depends on the situation. Most jujutsu incorporates pressure points, chokes, joint locks, striking, etc. Not too much emphasis on kicking usually, though there are some ryuu which have quite a variety of kicks. A look at something like the Genbukan and you can find a variety of kicks that certainly lack 'flash' but are quite practical.

I'd say jujutsu (japanese kind) always uses a finishing technique at the end of a throw as well, unless the person who was thrown is obviously going to be incapacitated after the throw or main technique.

Hapkido would probably be a better choice for you simply because it is Korean, and the strategies are a little more likely to be similar to TKD, and thus easier for you to pick up.

I would imagine the movement style and locks in general between hapkido and jujutsu are somewhat different as well.

Just putting in my two cents ... because that is probably all it is worth. From talking with my Instructor on several occassion I will give what I have acquired from him on these martial arts.

He was taught from his Master a blended Taekwondo/Hapkido format. On his own he also learned Jujitsu which he found the transition very easy as the falls, throws, rolls, locks, etc. were very similar. His earlier training was easier then most and allowed him to move through the JJJ system faster then most. His training partner and one of his former Instructors took this with him and found the same. Then both found it also an easy transition to BJJ.

Of course each has its differences but also their similarities. In our systems it is difficult to see where one art begins or ends as they are blended very thoroughly together. From stand up striking with Taekwondo to groundwork Hapkido/JJJ/BJJ ... they all work together well.

Sorry if this sounds like a "my Instructor is all of that", as this is not how I meant it. I just wanted to show that they can be blended and work effectively together. Again, this depends on the individual and what he/she puts into it.

Sounds about right to me.

I'm sure that there many differences between the arts.

Then again pretty sure that there many differnces BETWEEN different schools of hapkido OR jujutsu.

Only so many ways to inflict pain/injury on the human body--stands to reason that effective means of doing so would have alot of areas in common.

Perhaps proTKD should be doing his own research first before posing such a question. Coz if he'd done the research, he would have discovered that Hapkido has its roots in jujitsu.