There were a few rounds:
Depending on your level, the number of interviews increases the more senior you are.
How to handle multi-threading with Python.
The following metrics were computed from 75 interview experiences for the Rakuten Software Engineer role in Tokyo.
Rakuten's interview process for their Software Engineer roles in Tokyo is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for Rakuten's Software Engineer interview process in Tokyo.