In a SEEKING ALPHA post, Edward Hugh tells us it's Japan, many of whose companies " many Japanese companies have outsourced research, development and engineering overseas in the last twenty years."
Why ? Seems Japanese students' interest in math, science, and engineering is on the decline.
Even so, according to a 2010 NYT article Hugh cites, these same Japanese companies aren't merely sending these tech jobs overseas, they're sending Japanese workers overseas to do them !
“Japanese outsourcers are hiring Japanese workers to do the jobs overseas — and paying them considerably less than if they were working in Japan. Japanese outsourcers like Transcosmos and Masterpiece have set up call centers, data-entry offices and technical support operations staffed by Japanese workers in cities like Bangkok, Beijing, Hong Kong and Taipei.”