First, they ask to introduce yourself. Next, they will ask you why you applied to Hitachi. Then, they will specifically ask why you applied for the specific department and research group you selected. Then, they'll ask you a question about what big social issue (e.g., behavioral change, Japan population decline) you want to resolve and how in your past experience, you managed to resolve problems that contribute to that big social issue. Lastly, they'll ask you to give a presentation of your research.