Sri Lankan Student who studying in Japan needs to visit China for Internaltional conferance

Greetings!! I'm a Sri Lankan PhD student who is studying in Japan(Fukuoka). I need to participate in an International conference which will be held in Beijing, China in the last week of September 2012. I have two questions to ask in this regards,
1. Can I apply Chinese visa from the Consulate general of Fukuoka ?
2. I will be leaving Japan for the summer vacation and hope to come back on 10th September 2012. So If I apply Chinese VISA around 11~13th September, is it possible to get the accepted VISA before last week of September?