A Rain from the East

Question: Do you know of any Japanese kami, preferably associated with the weather, which might be missing a body part or some other Relic-appropriate object? My idea (seeing as I’m having trouble finding a Relic through which to channel the Sky purview for my Polynesian Scion that doesn’t require him to possess an item associated a violent domestic god [foreign is alright though, as it makes for some interesting politicking down the road]) is to have his divine parent gift him with an old trophy from WWII.

Hmm, didn't I see you over on the White Wolf forums? If not, wow, kami body parts have taken quite a surprising upswing in the Scion market lately! If so, you may have already gotten some ideas there, but we'll take a swing at it!

There are several sky-aligned Japanese gods that you might be able to scalp a relic from, depending on what your Storyteller is interested in. You don't necessarily need a body part (though if you want one, by all means, you can certainly get one), since anything belonging to a Japanese god could theoretically have been liberated in the spoils of war. In no particular order:

Fujin. One of the nastier of the Japanese gods, Fujin is a terrible ogre-monster who commands the winds. His most famous relic is the giant bag he carries, which contains within it all the winds and which he can open to let them out to wreak havoc at will. While it's much too large and powerful a relic to be suitable for Scions who are not yet gods themselves, your character might have a bit of cloth from the bag, or a length of thread, easily giving access to the Sky purview. Such an object could be worked into any item of clothing that would fit the Scion's imagery, from being woven through clothing that seems exceptionally light and airy to being worn as a hair tie that makes their hair always blow dramatically as if in a wind, even when the air is still. He's also said to wear a leopard skin, which your Scion's parent might have appropriated as a trophy. I could definitely see one of his stray winds (maybe more of a breeze) being a fun Follower or Guide as well, depending on how you played it. Fujin has no particularly famous body parts, but, being an ogre, things like hideous fingernails or teeth are always a possibility.

Raijin (Raiden). Raijin, Fujin's brother, is his sky-god counterpart, in charge of thunder and storms instead of driving winds. Where Fujin has his bag of winds, Raijin has a set of enormous taiko drums, and his drumming is said to be what makes the overpowering noise of thunder. Again, this is a hefty god-level relic and not something I'd give to a starting Scion, but any bit of the drums could be a possibility - perhaps some hide from a punctured drum, or a stolen drumstick, or whatever else you can think of that a god might hand to a prized child. Raijin also doesn't really have any famous body parts to mess with, but he has the same ogreish attributes, and since he's a famous eater of belly buttons, the irony of doing something with Raijin's own belly button (or one he stole from someone else) might be a fun choice.

Tenjin. This guy's a lot of fun; he's one of the few kami that is obviously and recognizably a former Scion himself, having been a mortal politician who was deified after his death. Unlike the unruly ogre-gods, he's a more benevolent figure, capable of visiting natural disasters on the populace but generally revered more for his connections to poetry and scholarship. He also lacks particular body parts you could steal (though perhaps you could liberate a piece of poignant poetry or other bit of writings?), but he has a particularly sacred cherry-tree that still grows in Japan that legend claims he moved to flower at his shrine, so petals, branches or roots borrowed from that might be good relic options.

Once you've got a relic trophy in mind, sit down and figure out what kind of imagery and style your Scion has, and then work that trophy into what he's already got going on. Since he's obviously not Japanese, it's more of a matter of taking that thing and making it your own than worrying about how the original Japanese god used it, so be creative!