Don't worry if you booked with Airpaz
I don't leave too many reviews, but after seeing all of the negative ones for Airpaz I thought I should. I found return flights (Osaka to Sydney) on Google and booked with Airpaz, about 60,000 yen cheaper than other options (Tway and Scoot). After getting a confirmation email with no booking reference numbers, I was quite worried and after looking at reviews for Airpaz, even more worried. However, a few hours later I got my booking reference numbers and checked the flights directly with the airlines. Everything on my itinerary went fine and as planned.