There should be very little water in the bowl when at rest.
Are you sure there isn't a plug somewhere, and that the bowl is being overfilled and then seeps down to it's natural level?
Toto Aquia dual flush toilet
The water level is at the second line starting from the middle.
Thanks! The water level seems to be filling up to the level in your picture and then occasionally seeps down so it is just below the opening to the drain (does that make sense?). It doesn't happen with every flush and otherwise the toilet is functioning well.