Been playing this game for quite some time now, altough I can't read kanji, I've been enjoying it since it's a fun sidescroll dungeon crawler. I've got up to the desert area and have a couple of questions: 1) On the third quest of Rank C, it asks me for an item called "Nokogiri" (rough romanizarion of the hiragana, didn't look up for it). Where should I search the ground for it or what kind of enemy should I be killing to drop it? Is it an item created by combining two others? 2) On the desert area there's some tablets scattered, four of them contains a kind of a colored code. I've already found all four of them, but where should I input the code, if needed...? Should I read them in order so it takes effect? What's the purpose of them?