Dangerous Calligraphy Tools

Exploration Stage: Bamboo Grove
From: Detective
Description: That grudge, who seems convinced that none of the evidence found so far has anything to do with his death... what the hell is going on? She doesn't leave my side for a moment, and she's so indignant that she looks like she's about to explode. Wait, maybe she's the one who blew up? I've heard about a certain trick that makes people explode... I'm going to try to see if I'm right and see if you can find me an inkwell.
Completed: This inkwell is filled with explosives. Just shake it and it will explode, so be careful... Oh, the grudge knocked the inkwell out of my hand! Is everyone all right? If we don't get rid of that violent grudge spirit soon, it might kill us. Okay, let's go see Hanako.