Maoka-san is my best friend.

Mr. Maesato is my best friend.

Mr. Maenomae is my best friend.

This rain is a harbinger of the typhoon.

He studied all night on the eve of the exam.

The Great Vowel Shift played a significant role in the history of English.

He is writing a thesis on the octovocalic theory.

A diphthong refers to the phenomenon where two vowels are pronounced consecutively within a single syllable.

The retired regent prime minister, Saionji Kintsune, was a court noble and politician during the Heian period in Japan.

He is doing special exercises to train his serratus anterior muscle.