The interview is a 5 step process.
Step 1 is a technical assessment. This is full of pictures and simple questions to uncover if you think like an engineer - for example a picture of two items floating in water, one a little deeper than the other, and the question is "which item is more dense?".
Step 2 is a personality assessment. This is designed to determine of you are cut out for sales (cold calling, rejection, competition, etc). It is in your best interest to be honest in answering these questions.
Step 3 is an interview with an HR rep. Most seem to have 1-3 years experience. So far, you've proven that you are technical enough, and resilient enough. This portion seems to be designed to weed out those that are awkward on the phone, as you'll be on the phone quite a bit.
Step 4 is an interactive webcam interview with a computer. You will be asked questions and then your responses will be recorded. This is a test of your ability to go with the flow and think in your feet. Questions are asked and then you get 30 seconds before the recording begins. This was by far the most uncomfortable portion of the interview, because you dont get any verbal or non-verbal feedback from an interviewer. Its just you and a cold, ruthless webcam.
Step 5 is a final on site interview. You should behave like you are on a sales call. This will include a product demonstration (you'll get the product info ahead of time. Prepare prepare prepare), a role play (i.e. Sell me this pen, etc), and questions from both you and the interviewer. Throughout the demonstration and role play try to keep asking questions, look for buying signals, dont drop price too much, identify decision maker, try to pitch additional products, etc. most importantly - be relaxed. Take time to ask any question that you may have - this is your last time to interview keyence as well.
One more thing - the final interview is also likely when you will find out what division and office location you are being considered for.