Consult this map for part 9:

As I mentioned before when playing Kaede, she is not very strong and killing demons doesn't give you anything. So I suggest you always run and only fight when necessary. Now, walk toward and turn left, use Shinobi Kit to unlock the door. Walk straight then turn right. There is a treasure box that is hardly visible at the right corner.

• Item: Kunai

Open the door, you'll see an object on the ground.

• Item: Fluorite

After picking up Fluorite, keep going left to the next screen you'll see two Buddha statues, go to the corner of the left Buddha (until your 2 legs are hidden from view), then press X to pick up a hidden Herb there.

• Item: Herb

Now walk around behind the room, destroy some porcelain jars. There is a book at the very end of the narrow path.

• File: Apocalypse #2

That is all, leave this room and continue to the next section (where you turn right, now continue straight). Keep going until you reach the waterfall, then enter the storage room and save your game. Kaede can unlock the other door in this storage room by using Shinobi Kit which Samanosuke previously couldn't enter. Keep going until you see a door, open it to the next room. You'll see 2 standing wood barriers blocking a treasure box.

• Item: Normal Arrows

Continue to the next room. As you appear, you'll see 5 blue porcelain jars, hit the one at the bottom right corner (Kaede's left) to reveal Kunai.

• Equipment: Kunai

This room has 2 doors left and right. From Kaede perspective, go to the right one first. Inside is a Magic Mirror and a ladder, save your game first then climb up. Destroy some crates to reveal a Fluorite and a book.

• Item: Fluorite
• File: Genbu

Go back down and proceed to the next room. As you walk to the next screen, be prepared to block 2 arrows. Kill the two Zombie Archers and turn left (ignore this door for now). Enter the second door. There are 3 items in this room and a ladder.

• File: Suzaku (on a shelf)
• Item: Herb (in a treasure box)
• Item: Fluorite (on an old chest in front of the ladder).

NOTE: at this point, if you already completed the Dark Realm, you should have all 20 Fluorites and all Files. You can open your menu to verify.

Climb the ladder, there is one trick box in this room, it is probably the hardest puzzle of this type.

• Key Item: Decorated Arrow (Solution: left, left, mid, right, right, mid, mid)

Exit this entire rooms and enter the door you just ignore early. There is only one black treasure box in this room, the problem is you cannot open it yet. Go around behind the room and pick up the Great Arrow. It will trigger a trap so you need something to replace the arrow position. Now go to your menu and select Decorated Arrow. The black treasure box will be unlocked and the door are now opened.

• Key Item: Great Arrow
• Key Item: Green Key (black box)

Exit the room, be prepare to block another 2 arrows again. Kill the archers and go all the way back to the room where you picked up Kunai beneath a porcelain. Go to the other door and unlock it with the Green Key. Enter, climb down the ladder, board a boat, enter the door, and watch a scene.