It is possible for the rooster to be japanese and have long legs. Short legs is recessive in japs, something that has to be tried for very hard! Plus it is a lethal gene. Now the hen, she doesn't look like a japanese. The shape of her tail does look like she might be OEGB. Let me find some pics of my OEGB and japs and show you.
But the roo does look like a jap, or at least partly. brb
Wow! I have way too many pictures!!
Ok, sorry, but these pics are not the greatest. This one has an OEGB pullet in the bottom left corner
And this one has a young BTW jap cockerel in it.
Notice the difference in the tails?
And here is a pic with an OEGB cockerel on the left (black) (actually, that one looks like a dutch, but same thing basically with the tails
)
Here's another one with japs and OEGB in it The one in front is a pullet, middle is cockerel (BTW jap), 2nd from left OEGB cockerel, and the one in the back is also a BTW cockerel. These are all about the same age as each other too.
Ok, one more with a bunch of young OEGB. They didn't have their long tail feathers yet. Excuse the junk, we live at my dad's right now
None of these are very good pics. Sorry about that.
Hope this helps