As kata applications were not a focus when I learned Isshinryu
This is what I saw the opening of Seisan Kata being used for.
A later time by 1982 or so I began to realize what power
Was to be had simply by re-defining every movement by
‘taking the next step’ of the kata as part of the definition.
I had also come to realize every kata movement could be
Inserted into any sort of attack,
Here is a different example which also uses ‘take the next step’.
Of course an entire range of other force multipliers
Are also involved:
1. the manner of breathing.
2. years working a makiwara.
3. knuckle pushups.
4. a variety of different timing for the movement being used.
5. the manner the knee release is used.
A more complete explanation of the principle ‘Take the Next Step’
Can be found here.