Needs review
Source: Rokugan Campaign Setting

Description: You are unaffected by the weight of Heavy Armor

Prerequisites: Base Attack Bonus +1, CON 13

Required for: Soul of Stone, Unyielding Fury

You are proficient with heavy armor. Your normal speed and running speed are unaffected by armor unless the weight would cause you to become encumbered. The maximum dexterity bonus you have in any heavy armor you wear is increased by 1 and any armor check penalty you may have is reduced by 1. This feat counts as the Heavy Armor Proficiency Feat when qualifying for prerequisites.