Gamaken's shield is not made of wood, if it were made of wood, the Animal Path's bird would have broke right through it.
If I remember right from my research on Jiraiya and his summons for the debate tournament, it's made like a saucer from a sake set(not that it is a saucer, obviously...just shaped like one), which are generally made out of ceramic. But that still wouldn't make sense as ceramic would also not be likely to withstand that kind of force.
Whatever it is, it can take anything any of the masks would hit it with. It wasn't even scratched by the Animal Path's bird.
Doesn't save them from the wide range attacks, but from straight line attacks it could withstand it.
If I remember right from my research on Jiraiya and his summons for the debate tournament, it's made like a saucer from a sake set(not that it is a saucer, obviously...just shaped like one), which are generally made out of ceramic. But that still wouldn't make sense as ceramic would also not be likely to withstand that kind of force.
Whatever it is, it can take anything any of the masks would hit it with. It wasn't even scratched by the Animal Path's bird.
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Nor did the impact from hitting the ground at such a force break it.Doesn't save them from the wide range attacks, but from straight line attacks it could withstand it.