Ninja Weapons that haven't been used in the series
 

Is there any ninja weapons we haven't seen throughout the show used yet?

Leo: Katana
Raph: Sais
Mikey: Nunchaku/Kusarigama
Don: Bo Staff/Naginata
April: Steel Fan
Slash: Mace

Other weapons:
- Kamas
- Sansetsukon/Sanjiegun
- Axe
- Scythe
- Naginata
- Manriki-Kusari
- Tanto
- Ninjato
- Hammer

My god, how many threads does this section need right now?

A lot of them?

Have San-jie-gun's been used? (Three section staffs.)

And I'm pretty sure the show has covered most ninja weapons, probably the only ones that haven't been used yet are the really obscure ones.

Is it really that shocking that the current and still fairly new series' section has a lot of threads at the moment?