I would suggest that there is no Stop/Start on the Hybrid Jazz in the accepted sense.
The engine is simply responding to the demands of either driving the car and/or charging the battery.
If the car does not require power to move it, or the battery is in a high state of charge, then the engine will not run.
All this is done automatically, with no input from the driver.
When I back the car out of my garage in the morning, the engine almost always starts, running at around 1600rpm, for perhaps a minute or so, before shutting down, then when I move off, it is usually in EV mode, until such time as the battery become depleted, whereupon the engine comes in to assist movement and charge the battery. This procedure ensures that there is some warmth in the engine to run the heater.
Under normal driving conditions it is difficult to know, by sound, whether the engine is running or not, 'EV' comes up on the dashboard to indicate when in EV mode.