you have to throw your sword at the gate and then use the chi art that is good against the
chi art form the gate shows

You must b at least level3. Press x in front of gate, then use the chi art that defeats
the chi sign on the gate (for clue access chi art settings page) immediately while the
sword is still hanging. for the black gate, you need kirin chi arts but you still don't so
just leep walking to the gate and you will be on a cut-scene

you throw your sword in them then use there weak chi art when it is in the gate