Texas Instruments Field Quality Engineer interview questions

All in Japanese (I live in Japan) and there are two interviews. The first one was they basically understand my background. The second one they asked me to prepare slides regarding my graduation research and asked me technical questions. Everything seemed good but they did not announce the result within the time they promised. (they said after two weeks) Not until one month passed I politely emailed them they told me I failed to proceed to the next step.