I don't get how you can make so many assumptions. KARA promoted enough in Korea, doing more of the same promotions in Korea wouldn't have gotten KARA anywhere other than trips to the hospital. They went on nearly all the shows on air now in kr. Seriously I thought they were dying when they promoted and they got little sleep. I am glad they ended it at 3 weeks (TV appearances airing even much later). They seem to be having fun in Japan. These Japanese shows are being really nice to them.... they have been giving them lots of attention and showering them with things they like (fun days at Jp attractions, food, pets, shopping). I really don't get this complaint.
I suspect that their contract may have a clause where they need to do x singles and 1 album a year or something like that. Which may explain wm sudden release since they lost time in the beginning of the year. You maybe the only person who doesn't think dsp can do really dumb mistakes. I don't see what is wrong with putting individual activities before group. The group needed rest, Gyuri wanted to do this musical. So they did a easy Japanese release, and planned their promotion around her schedule. It's not a big deal.
KARA has done enough this year. Sorry if they have some fun with "lame" Japanese promotions that keeps them in the jp public's mind.