What are the baggage restrictions for a Japan Air Lines International flight?

I would look this up myself, but since the quake off Taiwan my internet only accesses sites it likes. I live in mainland China. I have trouble accessing Yahoo most days. Today's a good day! I will be traveling from China to Japan and then onto Australia in 2 weeks. What can and can't I take in carry-on and how big can my carry-on luggage be? No links please since I probably won't be able to access them. I've tried several sites my search engine has given me, but I can't get any of them to load the information. Thanks.