Called the Fuwa-Fuwa Kids Festival, this is a very popular (get there early), family fun event held every year in the main area of the Green Arena concert hall (behind the old Hiroshima baseball stadium).

The event is held over 3 days, January 2nd~5th from 10am to 5pm each day. The busiest times are from 11am to 2pm, but it will likely be fairly busy no matter when you go.

There are Japanese Food stalls outside, special events held on the stage inside with popular anime characters who will perform shows and pose for photos with kids throughout each day. The biggest highlight of course is the huge bouncy castles, there are 26 different air-filled rides to enjoy.

Prices: (save 100 yen if you buy tickets beforehand)
Entry ticket of 600 yen or 1500 yen for a family (up to 4 members)
Ride tickets cost 1,000 yen for 11 tickets or get unlimited rides with a “free passport” for 2,500 yen