- ra -
- Rika Nenpyo Premium
...No limit ...1925- ...Figures, Statistics, Numerical datas ...General - Technology Rika Nenpyo Premium provides all of the data (from 1947 to present) in Rika Nenpyo (science data book which compiled by National Astronomical Observatory of Japan). You can also download these data in CSV form. Click [ログイン] button to login the database.