On Rt. 2 coming from Iwakuni towards Hiroshima

Turn left at the Akebonobashi Bridge
This is the intersection where you turn to go to Hachigamine Park

Go through the first stop light.  There is a 7-11 on your right.

At the next stoplight  you will see a Waki Town Hall  on your left . 
Turn right at that stoplight.
Keep following the road straight until you come to a 4 way  stoplight before a bridge. 

After crossing Yamato Bridge there will be  a stoplight.  Go straight through this light and very shortly you will see driveway into a parking lot.

This driveway is just  before a small ATM machine.  It is  a gravel parking lot.
Park anywhere you can find a place. 

Follow the gravel to the black paved parking lot  close to a building.