This book explains in detail about various sexual positions.

She decided to try the reverse cowgirl position.

This is a 六角四片四角孔ねじれ正多面體, in other words, a muoctahedron.

We should always remember the power of Kannon in difficult times.

He often uses four-kanji idioms.

Understanding the four-step conjugation in Japanese is difficult.

Koushirou is my best friend.

This box is perfectly square in shape.

This square box is very simple and beautiful.

I live in Yokkaichi.