OA had two sets. Set 1 had basic aptitude, cs related questions ,C++,JAVA and Python questions were asked. In 2nd set was Japanese langue test where they had given hints and we had to use them to answer the questions.

First of all it was aptitude round where they had questions on technical and non technical and also japanese questions the next round it was japanese pronunciation and technical round it was easy they asked question on any one tech and dsa ,oops and the last round was hr round it was buit difficult