IT positions are scarce??
I have been living in Japan for 2 years, and I change 3 times my job, each time in the IT industry.
IT is the most living industry of the country, and also the industry with the most opportunities due to a lack of technical skills.
There are a bunch of job offers on
CareerCross
Robert Walters (senior level)
Skill House
Wall Street Associates
etc.
I don't know how many years the IT needs will last though