It's fun to see colorful butterflies in the park.

The beauty of butterflies is breathtaking.

This sinusoid is a channel for carrying venous blood.

In mathematics, it is important to examine the parity of numbers.

He won the game with a strategy of winning by a surprise move.

Kushinadahime is an important figure in Japanese mythology.

In old Japan, the room where a couple slept was called a 'Kimioto'.

He keeps a Mongolian horse.

Learning about the existence of Yamatai-koku is very interesting.

Whatever you say to him, it's like casting pearls before swine.