Isekai ni Teni Shitara Yama no Naka datta. Handou de Tsuyosa yori mo Kaitekisa o Erabimashita - Vol. 2 Ch. 9

[MangaDex]

 

[letmereadmangas]

a wall seperating the toilet from the rest of the house is an inovation....seems the overall IQ in this world is extremely low.
also....plum jam and cheese? Japanese realy have weird taste buds

 

[Izaya_Onisai]

These time skips are really doing this series quite the damage...

 

[Kaarme]

I don't quite understand what exactly he registered and what's bringing him money. I can't sometimes follow this mangaka's train of thought.

 

[Godc0re]

The others don't wall of their toilets??

 

[Goldenzeal]

a wall seperating the toilet from the rest of the house is an inovation....seems the overall IQ in this world is extremely low.
also....plum jam and cheese? Japanese realy have weird taste buds

I don't quite understand what exactly he registered and what's bringing him money. I can't sometimes follow this mangaka's train of thought.

The others don't wall of their toilets??

It's not really explained at all and there are a few things it could be, but I would assume the big invention is the "S-trap"
The S-trap is the S shaped bowl form which prevents gasses from escaping and was invented in 1770.
It uses water to create a seal that prevents sewer gases from escaping the bowl and was what made indoor toilets common.

Indoor bathrooms and indoor plumbing were not really a thing until the industrial revolution around 1800.
Most places had outhouses away from the living space because of the limited ability to remove smells.
Flushing was not really a thing until then and you had to build the toilets into a flowing waterway to "flush" things before 1800.
But even if you poop directly into a constant flowing river, it is not enough to prevent bad smells
Also, from the looks of things, I think he made a bathroom out of concrete and bricks.
Considering he said "the walls are not dried" I'm assuming he also has some type of concrete insulation too.
Which also prevents smells from escaping the room itself.

It is very possible his version of concrete is not widespread, Concrete has been around for a long time.
But the bigger thing would be S-trap plumbing technique.

Thanks for reading my comment about our shitty history.

 

[letmereadmangas]

It's not really explained at all and there are a few things it could be, but I would assume the big invention is the "S-trap"
The S-trap is the S shaped bowl form which prevents gasses from escaping and was invented in 1770.
It uses water to create a seal that prevents sewer gases from escaping the bowl and was what made indoor toilets common.

now THAT makes alot more sense...