The Iron Naginata (鉄の薙刀 Tetsu no naginata) is a Naginata that is introduced in Fire Emblem Fates. One of the most basic Naginata appearing in the game, the Iron Naginata bears no special features apart from raising its wielder's Defense and Resistance by 1.
The Iron Nageyari (鉄の投撃薙刀 Tetsu no tōgeki naginata, lit. Iron Throwing Naginata) is the enemy-exclusive ranged variant of the Iron Naginata.
The naginata (薙刀), was a polearm used by samurai. It was essentially a spear with a curved blade. The naginata is one class of the Nihontō (日本刀), Japanese bladed weapons.
Nageyari (投槍) literally means "throwing spear," and the yari (槍), is also polearm that samurai used, which had a straight blade. This kind of weapon is also a class of Nihontō.