Rikuchū is a former place name in Japan, referring to a part of present-day Iwate Prefecture.

He is working hard on his Japanese studies day by day.

Every day, he exercises at the gym.

My father drinks milk every morning.

She drinks milk every day to maintain her health.

He always comes late, so it's hard to wait.

Azetidine is an important compound in organic chemistry.

He is widely recognized as an intellectual in that field.

Histidine is one of the essential amino acids that cannot be synthesized in the human body.