My name is Yasokawa.

He was working abroad for twelve months.

Keijuro is my best friend.

It's a tradition in my family to go to the Thirteen Buddhas Pilgrimage every year.

He is doing squats to train his quadriceps femoris muscle.

Please calculate the quartiles of this data set.

This regular tetrahedron is composed of equilateral triangles on all sides.

This shape is a parallelogram.

He is working round the clock.

My four treasures of the study are a fountain pen, a pencil, an eraser, and a ruler.