He is an old acquaintance.

He is always irritated because everything is annoying to him.

Shiho cannot sleep when she drinks coffee.

The 24-cell is one of the geometric shapes in four dimensions.

The 120-cell is one of the regular polytopes in four dimensions.

縱 is a kanji that is not often seen in names.

He always keeps in mind the phrase 'If one learns without thinking, it is a waste.'

This work is almost finished.

She plays a character named Maiko.

In this graph, the vertical axis represents time.