Fumitsuka is my best friend.

His posthistory was very interesting.

This book explains the brief history of Japan in detail.

I read the History of Ming and learned deeply about Chinese history.

I bought a new calendar.

We are currently using the Gregorian calendar.

Please check my history.

This area is mainly composed of conglomerate.

Japan reformed its calendar in the fifth year of the Meiji era and adopted the Gregorian calendar.

Japan revised the calendar in 1873 and adopted the Gregorian calendar.