When you complete the following tasks you will obtain the corresponding weapon.
In Chapter 1, there is a statue in a shrine holding that weapon after the halfway point.
In Chapter 2, you will see another building just before you go to the Dragon Shrine. Kill the ninjas there.
Dragon's Claw and Tiger's Fang:
In Chapter 4, take those weapons from the glass display case in the first room at the Statue Of Liberty's base.
In Chapter 5, a dead ninja will be holding this weapon on the second bridge you reach on your right.
In Chapter 6, defeat Volf.
In Chapter 7, this weapon can be taken from a dead ninja in the storage room that you drop into.
Added by: Sanzano May 9th 2011, ID#7270