
Originally Posted by
Sunrider
Yes, and those too are fusions of two elements.
Remember, during Kakashi's introduction to element training in which he explained the nature of kekkei genkai, the first question Naruto asked was about genkai such as the Nara clan's, which doesn't seem to follow any element. Yamato interjected with the presence of not just elemental chakra, but yin and yang chakra (something we saw mentioned when Mintao sealed half of Kurama's chakra). Yamato then left the conversation unfinished citing the complexities of getting into yin and yang.
That said, other kekkei genkais are indeed elemental fusions (see the latest Mizukage, who seems to have two seperate genkai), just of a different complexty than mokuton or hyoton. .