The ability to re-configure oneself or join together with other vehicles or figures to create new and more powerful vehicles and figures.
Source:
Superhuman Samurai Syber-Squad, toy packaging.
In other words, "our toys are like
Transformers, but with more
technobabble".
In the context of
SSSS, the word had absolutely nothing to do with
samurai. If I didn't know where "samurization" was from or what it's supposed to mean, I'd assume it meant "what a
samurai does", and thus what happens to you if you, for instance, insult a
daimyo, or tell a samurai that thay are without honor.