Come visit our strange and beautiful 100-story underground house that descends deep into the earth!

The second installment of "The 100-Story House," "The 10-Story House Underground," is a picture book that allows children to easily learn the numbers from 1 to 100 while going down 10 floors at a time on the 10th, 20th, and 30th floors underground, where different animals live.
Rabbits, cicada larvae, caterpillars, ants, earthworms, hedgehogs, lizards.
The characteristics of the animals that appear, such as moles and turtles, are drawn in detail with a unique imagination, making reading even more enjoyable.


You can learn about numbers and the ecology of each animal in an easy and fun way by meeting them.
The illustrations in this book are designed to be read downwards, allowing children to fully enjoy the feeling of descending to the 100th floor underground along with the main character while reading the book.
Meet the animal friends living underground and have fun learning numbers through unique content and composition.

There was a girl named Kura who loved to take baths.
One day,
While Kuga was taking a bath, he suddenly heard someone's voice.
“Ku, there will be a party soon at our house on the 100th floor underground.
“Would you like to come and play?”
“Oh, surprise! Who the hell are you?”
“The entrance to our house is at the foot of the volcano across the lake.
You must come.
“I’ll be waiting.”
Then someone disappeared into the bath water.
--- p.2

“Oh, sorry! Is this where the party is being held?”
“That’s right.
You're invited too.
Then let's meet later."
Koo went down the stairs towards the 100th floor underground.
“Is this the rabbits’ house?”
“In this house, there are different animals living on each of the ten floors.”
We reached the 10th basement floor.
Who will live on the next floor? --- pp.4-5

There was a caterpillar living there.
“Do you like bowling? Roll me and hit me.”
“Yahoo! I got them all right!”
“I’m rolling up fallen leaves to make rice cakes.”
“I want to try it too!”
We reached the 40th floor underground.
Who will live on the next floor? --- pp.12-13

There was an earthworm living there.
“I want to try making pottery too.”
“Wow, you’re really good at making it.”
“What are you using that for?”
“Hahaha, it’s a secret! You’ll find out soon.”
We reached the 60th floor underground.
Who will live on the next floor? --- pp.16-17

There lived a hedgehog.
“I’m collecting jewels.”
“This stone shines in seven colors!”
“A baby hedgehog was born.
“Do you want to hug me?”
“Oh, so cute!”
But I don't know where to hold on to."
We reached the 70th floor underground.
Who will live on the next floor? --- pp.20-21

The birthday party has begun.
The animals came one after another and gave the grandmother birthday presents.
Koo decided to wash Grandma Turtle's shell.
Grandma was delighted when her back began to shine.
After everyone ate the delicious cake
Grandma said to Koo.
“I will pick you up when you go back.
“Get on my back.”
“I held onto Grandma Kuga’s back tightly…”

--- p.28-29