世界歴史年表: a world history timeline with room to compare

Field notes

The interface aligns events across nine regional rows and supports filtering by region and classification, six horizontal zoom levels, four information-density levels, and a searchable list view. Selecting an event highlights its location on a map, while a population layer uses 16 reference years and distinguishes historical estimate ranges from post-1950 United Nations estimates. The site labels dates by confidence and identifies Yamakawa Publishing material as its primary source.