Please tell me the equivalent word in translation for this English phrase.

His research is mainly about the ancient Chinese Kyūjitai form of 国号.

Let's look up the headword of this dictionary.

He lost his temper because the waiting time was too long.

He is good at learning foreign languages.

He was struggling to understand his internal language.

The Goto Islands are located in the southwestern part of Japan.

His palatial residence is built on top of a mountain.

This poem contains a kigo that symbolizes autumn.

My room is twenty-five square meters.