South Sudan: Why does Japan hesitate supporting UNSC resolution on South Sudan?

In response to the deteriorating human rights situation in South Sudan, Kazuko Ito, Secretary General of Human Rights Now contributes an article to the News Week to discuss the obligation of international community to prevent genocide, especially in connection the role of Japan on UNSC resolution on armed embargo.
http://www.newsweekjapan.jp/stories/world/2016/12/post-6494.php

Here is the English translation “South Sudan on the brink of ethnic cleansing: Why is Japan expressing hesitation towards the Security Council’s Arms Embargo Resolution?”.
south-sudan-article-translation