[SSJup81]

Well, the only "circumstance" that all had in common, was that they were hired from overseas and were asked to come over last minute, and didn't have the time to do the process of obtaining the Work Visa in their home countries, and just did it in Japan. Guess it had a lot to do with the fact that these were dispatch companies, and how they don't send one his/her CoE, unless they know for sure that they can offer said potential employee an actual position. IIRC, they got there and maybe a couple of days later or something, they changed their visa status with the help of whatever dispatch company they were hired through.

I guess a dispatch company is equivalent to a temp agency which works in the same way.