Ran it through Google and Bing translators, and they say kerosene. Maybe that's what was in the 16-liter drum.
kerosene is airplane fuel
*moving in closer**game show buzzer sfx*Why would you want to peek anyways...?She wants to see them badly because you stubbornly try to hide them.If you don't care about hiding your body, I'm sure Nee-san will lose interest in peeping.Err. Give her a break from the 16 liter. That's just for anti-theft.Sorry, I impulsed...Mu-mu!Nee-san's trying to peep at Oyakata-sama while she's bathing again?If something is hidden, people want to see what's hidden. That's how humans' hearts are.Nee-san will stop peeping and I'll be rejoiced!Bathing RoomI came to peep too... I mean... I'm here because of my passion for work.I'm not letting nee-san get all the fun.Once she gives up with this, I'm going to invite myself in.Truly, a Spiderman!I switched it over!People who want to see that badly should barge right in to look... Though, I'm not letting anyone see my body.Oyakata-sama, that might be the problem!I'm Not Afraid of the Punishment Game*pant pant*Well, you might be right...I'm socking you in the face first!Badgers from the Same HoleNormally, these kill.*Huff puff*When I thought I heard something loud, it was Kinka again.Here goes... Divine punishment for savages!Bwahahaha! You fell for it Ginka!*Zer-Thump*It's settled! Oyakata-sama has to throw away her humility, being completely naked whether night or day!Here, everyone's happy!Okay, gotcha.Q: Name an object, other than a metal tub, that can drop as the punchline.A: A 16 liter drum filled with things inside.※Karindou has falling tub traps set around the place. (nicknamed Drifters Impact)Kerosene... Ah.