I be flying from Syd to Osaka KIX via Brisbane and Tokyo Narita Airport with QANTAS (QAN) airlines.

SYD Domestic to Brisbane Domestic (QAN)- Brisbane International to Narita Terminal 2(QAN) - Narita Terminal 3 to Osaka KIX (JESTAR in the same travel itinerary)

My main concerns are:

1.)Will my checked-in luggage get delivered directly to Osaka from Sydney?

2.)I only have 1hr 45 mins in Brisbane. Will I be tight in time while transferring from Brisbane Domestic to International? Will there be automatic & bus transfers since I'm flying with Qantas?

3.)At Brisbane international will I need to go through the Check-in counter again or do I go straight into Customs?

4.)Again I only have 2hr 45 min in Tokyo Narita. Will I be tight in time while transferring from Narita Terminal 2 to Narita Terminal 3?

My flights are real soon and it looks like the Qantas staff are just as clueless as I am. For those people who had a similar flight itinerary, please clear some waters for me.

Thanks