You are now in control of Kaede.
TIP: Since you don't have a gauntlet to absorb souls, there is no point in fighting monsters. You should only run and fight when necessary.

Consult these maps this part 6:

Exit the room and watch another cutscene.

• Key Item: Red Key

Head back outside to the courtyard, enter the green door where you used Robe Ladder. This time, you can open the door with Red Key you just obtained. Keep running a few feet, you will see a treasure box.

• Item: Herb

Keep advancing until you reach an archery range where you'll encounter a solder fighting a Zombie Soldier and two Zombie Archers. Kill the Zombie Soldier and climb up the ladder to kill the other 2 archers. Climb back  down and talk to the soldier to claim your reward. 

• Item: Soul Absorber

There is another door on the second floor, but don't go there yet. Instead, use the door before the ladder. There is a secret achievement in this garden. 

Achievement: Bamboo-zled
It is very simple, cut a few bamboos in this garden and the achievement will be unlocked.

Keep walking 1 or 2 screens, you'll notice something flickering on the ground.

• Equipment: Kunai

Proceed to the next room. Inside is a puzzle box and a Magic Mirror.

• Item: Magic Jewel (Solution: 5th, 7th, 2nd)

Now get outside, you'll see a dead soldier and an item on the ground. 

• Key Item: Wooden Gear

Don't bother opening the entrance doors, it's locked and requires Gold and Silver Plates to unlock. Go back to the archery range, this time climb up the ladder and proceed to the next door. Use the ladder to go down, you'll see a Magic Mirror and a treasure box.

• Map: West Area Map

Save your game if needed. Examine the door next to the Magic Mirror, Kaede will automatically use Shinobi Kit to unlock. Keep walking until you see the last door (ignore the first one). Once you appear, open a hidden treasure box to your right (Kaede's left); it's partially visible from a fence's gap. In the middle of the room is another treasure box with Journal #5 insdie. On top of a shelf is another file.

• Item: Herb
• File: Journal #5
• File: Suzaku

Now examine a cupboard to the right, then use Wooden Gear to activate it. Oh, it's a secret room with more items. See a standing Buddha statue? It is a Fluorite. Inside the treasure box is the Silver Plate, next to it is a blue book.

• Item: Fluorite
• Key Item: Silver Plate
• File: Byakko

Backtrack to the first door you skipped early, enter it. This room has a furnace that breathes fire in 3 lines, weird right? Now before you go through it, you need to pull down a tab at the left corner of the room to open the other door but it will gradually close, so you gotta time it right. Inside this room, the Gold Plate is on the wall. Did you also notice two crates? destroy them to reveal a Herb on the ground.

• Key Item: Gold Plate
• Item: Herb

Remember the door in the area with a soldier corpse where you picked up the Wooden Gear? Now go all the way back there and use the Gold and Silver plates to open the entrance door. Don't forget to save. 

The hallway is on fire and it can hurt you, so you have to walk carefully. From where you stand to left is a staircase, and to the right is a door where you need to go next. You will find a staircase in this room with a few barrels and the one next to the staircase has a Fluorite.

• Item: Fluorite

Pick it up and head upstairs to open a chest.

• Equipment: Sacred Knife (Solution: mid, right, right, left, left)

Equip it immediately. There is nothing here so exit to the fire hallway and walk through until you enter another small room full of jars. Break them all to reveal a treasure box. Right next to the box is another file.

• Item: Kunai
• File: Genbu

Go back to the start of the hallway and use the staircase I mentioned early. Now before you enter, I suggest you go outside and save your game first because you are going to fight a mini-boss. under the staircase is a prison with the princess Yuki locked inside. Watch a cutscene and fight a mini-boss.