There were three interviewers. They asked different kids of questions about my intention and why I wanted to go on the jet program. It wasn't so difficult, but in the end i decided to take a different job somewhere else.

You will be interviewed by a panel of around 3 people. One person was kind of the "bad cop" who would ask tough questions, so be prepared for that. The main interviewer will ask you about your professional and educational background, and be sure to highlight any activities that involve cultural exchange or involvment in the Japanese community, rather than strictly interest in Japan. Another interviewer will try asking you questions in Japanese, but this is usually only bonus points for the interview.