I was in Japan and Korea for three weeks, but the time spent shopping for toys was super limited, especially going to a store seeing something then back to hotel to research then almost running back to the store before they closed to get chosen items. Then also allowing for space in the suitcases, and any excessive travel ahead of any purchase. It was an amazing trip, and I have to seriously thank my wife for being so supportive of all the spending, but she understood how this was a dream come true
Also I have to thank Jetstar, we flew from Cairns to Osaka return. On the day of return to Oz we took the Bullet train from Tokyo to Osaka, all our planning had us getting into the airport three hours before the flight. We were SO wrong, we ended up spriting to the counter with only about 30 minutes until departure, the staff at the counter just smiled and helped us through security and immigration at an amazing pace, no sweat.
Also a special thank you to this forum for pointing me in the right direction to find the stores.