A student well versed in even one technique will naturally see corresponding points in other techniques. A upper level punch, a lower punch, a front punch and a reverse punch are all essentially the same. Looking over thirty-odd kata, he should be able to see that they are essentially variations on just a handful.
Gichin Funakoshi (1994). “Karate-dō Nyūmon: The Master Introductory Text”, p.44, Kodansha International
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