My 2014 IS350 F Sport occasionally shows a small unidentified yellow light blinking on the tachometer dial. The position is in the red band just to the right of the number 7.
The car has no apparent problems and the check engine light is not on. The blinking lamp is quite small and is not associated with any icons on the face of the dial.
This is a complete mystery to me.

 

Could it be the speed indicator?

You can set a maximum speed limit in the settings where it will warn you with yellow your going to go over the limit you set it'll go red if you go way above it.

Maybe take a photo of your dash and use paint to put a red circle around the area your speaking about.

 

The only thing I can think of is the speed indicator^^ but mine doesn’t flash. I have mine set to 75, so when I hit 75 two yellow rectangles pop up around the speed/gear I’m in. Red when I hit 100.

 

Need pictures or video, I'd say. I don't see how a light could be inside of the red zone.

 

Can you tell us when does that light blink? You could take a look at the instrument cluster in the owner's manual and tell us which one it is.