How to write Japanese historical dates in scientific papers and how to convert them into Christian dates

Authors=HAYAKAWA Yukio, KOYAMA Masato, MAEJIMA Yoshinori

Journal/Book_names=Chikyu Monthly

volume=27

number=11

pages=848-852

Publish_year=2005

Publish_Country=JPN

Publisher=Kaiyo Shuppan

Language_of_Text=JA

ISSN=3873498

ID=200512604