There is a large playcentre within the airport in Osaka!! The name of the centre is “ Bornelund Asobi no Sekai Osaka Kansai Kuukou ”
It is on the 4th floor of the North Terminal.
There is a bay for strollers, breastfeeding rooms, change tables, juice vending machines and a special area just for little babies.
Kids from 6 months – 12 years are welcome.
If you decide that you like this brand of playcentre: you may like to visit their other branches all over Japan.
BORNELUND ASOBINOSEKAI KANSAI AIRPORT
NORTH TERMINAL , 4F
OPEN 10AM-6PM
PRICE FOR KIDS : 600 YEN FOR THE FIRST 30 MINS , 100 YEN FOR EVERY ADDITIONAL 10 MINS
PRICE FOR ADULTS : 600 YEN TOTAL
See here for more information on Kansai International Airport in Japan with kids.