Both the downward and sideways forms are very often used to attack from the straddle stance to the side, often following an 'empi' attack (see below).

Tettsui-uchi (bottom-fist strike). This is also in two forms exactly like the preceding one, except that the fist is not flicked over. The bottom or little finger side of the fist has a wider striking surface and is better for striking soft targets (such as the solar-plexus) rather than the back-fist.