This interview process is extremely lengthy. At first, they spend at least a week reviewing your initial resume. After that, you are administered a timed programming test which is rather difficult (I was told no one in my group got the entire thing correct). After that, you go through approximately 4 more interviews, all spaced about a week from one another (they are all held on Skype). Many of them will include technical grilling, but nothing over the top. Overall, the entire interview process takes approximately 4-5 weeks before the offer.
Random timed programming test
The following metrics were computed from 20 interview experiences for the Rakuten Software Engineer role in Tokyo, Tokyo.
Rakuten's interview process for their Software Engineer roles in Tokyo, Tokyo is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Rakuten's Software Engineer interview process in Tokyo, Tokyo.