Web hand - Toho

Red circle indicates striking surface

Overview
An interesting technique that seems to have a single purpose - to jab at the throat. Probably more theoretical than practical as there are so many better ways to achieve identical results with the risk of a broken thumb.

Used in these katas
Unknown

Striking targets
Front of the throat

Technique
Open the hand, jab throat. The gap between the forefinger and thumb neatly guides the strike in.

Strengths

Creates a nasty shock, without the necessity of serious injury

Weaknesses

The thumb is extremely vulnerable

Doesn't seem to have any other uses