There are quite some weapons you can use as a Japanese themed guy.
All them Long hafted, hafted shit, some bows, some thrown, everything is there, just look.
And, if you want to add some armors/weapons, feel free to get some models and stuff done and present it to developers. Bare in mind that some of the stuff you can find from other mods is copyrighted and/or not for re-use. Not that easy to find so much things for such underplayed game. And also, please, no more armors and shit unless there is removal of some old ones...it is getting way too much atm, variety is great, but hey, i want some FPS aswell.