Axes and Hammers are Weapons in Nioh 2 and information about their stats is shown below. These weapons work in conjunction with the Axe Skills skill tree, and both have good default scaling with the Stamina stat. While they both scale with Courage, Axes have higher default scaling with that stat than Hammers and relatively low scaling with Strength, whereas Hammers have low scaling with Courage and scale with Constitution. Lastly, Hammers (and the Wooden Axe, like all wooden weapons) are considered Striking weapons, and do 25% less melee damage and do 25% more Ki damage compared to Axes with the same attack rating. The Pickaxe is unique in that it has the same stat scaling as Hammers, but without the damage penalty.
The Axe movelist has a special mechanic where they deal 25% more damage to enemies hit by the tip of the hit box (the blade or the hammer head) rather than the part closest to you. .
In general the weapon is slow, with many attacks with significant startup as well as a suite of chargeable attacks, and it is not particularly high in damage per second, but each individual hit does a large amount of damage, Ki damage, and Anima fill regardless of what weapon type you use, and many of the attacks prevent you from being staggered regardless of Toughness. In addition, Lumber Chop is the highest single hitting attack among melee weapons when fully charged, and does comparable damage to Iai Quickdraw II if you release it immediately, and the Ki damage this weapon can deal in general and with Rumbling Earth specifically tends to snowball heavily against Yokai enemies - if you drain their Ki once, it effectively ends the fight against many enemies and some bosses, either from the incredible burst damage from lumber chop and Mad Spinner II or from immediately draining their Ki again after they recover with Rumbling Earth.
Against Human enemies, it has access to Roar and Stone Mallet, two attacks that tumble them if they hit. Hitting them again will ground them, giving you access to a large amount of guaranteed damage. Stone Mallet also has an extremely high Break property, so it destroys blocking enemies very consistently.
This weapon strongly favors heavy armor, as you are likely to take hits while using it and the weapons also have the lowest block stat among melee weapons, so you still want high toughness even if not for the stagger protection.
Below is a list of Axes in Nioh 2, and each Axe has an effect that will ALWAYS be present, no matter what other random bonuses there may be, and these are listed in the "effect" column. Damage values are not listed since these change by rarity and level, making it difficult to compare them easily. Break and Block are listed, since these do not change with rarity or level.
Every Weapon in the game has Familiarity. The better quality of the weapon, the more Familiarity can be obtained with the weapon, and over time the damage and bonuses of the weapon will improve as the Familiarity increases up to a maximum. This way, using the same weapon over time can yield higher damage than another, even if it's lower level.
Please see Axe Skills for more information on the weapon skills.