/ naginata can be crafted with the following recipes

Player Recipe
Primary skill used: fabrication(7)
Required skills: N/A
Time to complete: 420 minutes
Tools required:
> 1 tool with grinding quality of 2
> 1 tool with anvil quality of 3
> 1 tool with hammering quality of 3
> hotcut
> electric forge (160 charges) OR acetylene torch (160 charges) OR electric arc furnace (80 charges) OR charcoal forge (160 charges) OR basecamp forge (160 charges) OR demon forge (160 charges) OR rock forge (160 charges)
> metal fileset OR pair of flatjaw tongs
Components required:
> 1x long stick
> 2x fur pelt OR 2x leather patch
> 2x lump of steel OR 8x chunk of steel OR 40x scrap metal
Byproducts:
(none)
--
This recipe can be found in the following books when fabrication is at least the required level:
The Swords of the Samurai (level 6)

Player Recipe
Primary skill used: fabrication(7)
Required skills: N/A
Time to complete: 120 minutes
Tools required:
> 1 tool with grinding quality of 2
> 1 tool with anvil quality of 3
> 1 tool with hammering quality of 3
> hotcut
> electric forge (100 charges) OR acetylene torch (100 charges) OR electric arc furnace (50 charges) OR charcoal forge (100 charges) OR basecamp forge (100 charges) OR demon forge (100 charges) OR rock forge (100 charges)
> metal fileset OR pair of flatjaw tongs
Components required:
> 1x katana OR 1x wakizashi
> 1x long stick
Byproducts:
(none)
--
This recipe can be found in the following books when fabrication is at least the required level:
The Swords of the Samurai (level 6)