Complete the Temple of Fire in the main quest. Upon leaving, you'll see a sub scenario icon on your map. Piece o' cake.
- Return to the Starkfort after completing the Temple of Fire. Previously there was an entire central section left unexplored; run north in the main hall to find a set of stairs in the far north. These were previously blocked off, but with the sub scenario active they'll be wide open and ready to accept visitors.
- Second floor. Follow the red rug south and you'll see two chambers, one to the left and one to the right. The left contains two chests; in them are a Dragon Fang and a Bacchus's Wine. The left contains a normal chest with an Ice Charm and a blue chest you can't open.
- Continue south to the next set of stairs. Head up.
- Third floor. Check the two seemingly-empty rooms to the east and west in the next hallway up. If you bump against the walls in the west room you'll find a secret passage leading to a treasure chest containing a Safety Ring.
- Head north to a west-east hallway. Go east to find a small chamber with an X-Potion, then head north. There's another west-east hallway, this one nicely sunlit, with two sets of stairs leading to the next floor. Go up the western set of stairs first, then run all the way south to find another set of stairs. Down them you'll find a Courage Ring.
- Return to the sunlit passage and go up the eastern set of stairs next. Wander south to find more stairs; along the way you'll find a chest containing a Kunai.
- Up the stairs. Cut scene ensues. Once it's done you'll be on another floor. Start by going right; you'll find a set of stairs leading to a chest with a Turbo Ether.
- Go back up to the fifth floor and check out the northern hallway. Near the stairs up here you'll find a robed save dude, and a short jaunt west of him a chest containing Power Bracers. Save and head up the stairs.
- Cut scene and the inevitable battle. Woooo!
This is a weird fight. Kamiizumi is largely a reactionary fighter, and his attacks are based on what you use first. Aside from powerful basic melee attacks, he'll spend most turns using one of two moves, both of which are counter-based. If he uses Nothing Ventured, he'll counter any physical attacks with a strong physical attack of his own. If he uses Know Thine Enemy he'll counterattack any single-hitting physical attacks with one strike that will usually mangle whomever's unlucky enough to attack first. Occasionally he'll use Before Swine, which counters magic, but it's pretty rare. As you progress through the battle Kamiizumi will give up on countering and instead pump his BP into normal attacks, and even with Default on his hits are strong enough to kill. Yeesh.
Nevertheless, this isn't that bad a fight. Spend several rounds using Default, during which Kamiizumi will probably waste his turns on counters. Once you're up to three points apiece, wait for Kamiizumi to counter and use up his BP, then go on the offensive. If you're lucky he'll either use one normal hit or do nothing at all. Default back up to full BP and repeat. This is less useful when he starts to attack normally, but it's still a viable strategy for bringing Kamiizumi down.
- Once the battle's won you'll earn the Swordmaster asterisk, which, aside from its nifty countering attacks (best used if you know how your enemy fights), is pretty good for straightforward melee damage. Strategic players will love this class.
(Note that if you complete the Salve-Maker quest before taking on Kamiizumi, the cut scenes that occur before you fight the Swordmaster will be slightly different than if you took on Kamiizumi first. The same goes for Qada's scenes in his own sub scenario.)