I moved to Japan under a "Engineer/Specialist in humanities/Int'l services" visa a year ago, and have been working fulltime at an engineering company located in Japan. Unfortunately the company folded, and I'm left to find a new position to keep my visa. I found another large company in Japan who offered me a new fulltime engineering position, but for the probation period (6 months) I'll technically be employed as a full time contractor (keiyaku sha-in) and not actually a permanent employee (sei-sha-in).

Will this be valid to upkeep my Visa, or will I have to keep looking for a new job? Sorry if this isn't the right place to ask. I tried looking on my own and couldn't work it out.