The process took 2 weeks. I interviewed at McKinsey & Company in Feb 2010
Interview
I applied online. After the background check, I was invited to their office to take the paper test. The test was not so difficult if you could read English. After passing the test, I was invited back again to have a 1 on 1 interview with a consultant. The interview was pretty informal, laid-back, and of course in Japanese. The questions were about my resume, leadership experiences, and the case.
After submitting my application in their portal. In about two days I recevied the link to do their Solve assessment, The assessment had three games. I was however not selected for the next rounds.
Recruiter Round - not that difficult: we dicusssed background, interview timeline, current visa stutus, and limited bahaviroal questions. And I was able to pass into the 1st round interview after this one.
Whole timeline: recruiter interview -> 1 month -> 1st round
The interview process was tricky - several technical and consulting questions were asked. Good preparation is needed to clear it on the basis of data analysis, problem solving and communication.