Japan defence minister resigned because she destroyed internal records for Japan-UN mission.

https://www.theguardian.com/world/2017/jul/27/tomomi-inada-japanese-defence-minister-resign-south-sudan

This is not surprising because Japanese government will destroy and whitewash anything that the government doesn't like.

Japanese government insisted in the UN mission continuation despite its own law didn't allow it and this led to her to destroy the internal record.

She was unlucky that someone found the internal record on a computer that she claimed was discarded.