What to do: Speak to Kaede in a house located in Port Bastok (I-5). Then go into the warehouse in Port Bastok (F-5) and speak to Kagetora. Then go back to the same house where Kaede is (I-5), but this time goto the room to the left and speak to Ensetsu.
Go to Bastok Mines -> Zeruhn Mines -> Korroloka Tunnel to (A-9) then you'll be transferred over to (N-8) of same map. Now head over to (G-8) then you'll be transferred over to (I-11) of same map. Head over to (K-8) and there will be a ???. Get ready and click on it to fight 3 Korroloka Leeches (Leech type NM). You may want to clear the area of Thread Leeches since they will start attacking you if they see you are fighting the Korroloka Leeches. After the fight click on the ??? to recieve a key item.
Head back to Ensetsu in Port Bastok (I-5) then head to the new area Norg and speak to Ryoma to complete the quest.