It was not complicated. But their hiring standards are a little bit vague and off-table. You don't really know what they want. It is definitely wise to know Japanese, the language, for the best performance of your interview.
Do you speak Japanese?
The following metrics were computed from 3 interview experiences for the Rakuten Software Engineer (Internship) role in Boston, Massachusetts.
Rakuten's interview process for their Software Engineer (Internship) roles in Boston, Massachusetts is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Rakuten's Software Engineer (Internship) interview process in Boston, Massachusetts.