Map of Japan by prefecture, one number per prefecture

About this template

Data: one row per prefecture with its ISO 3166-2 code (JP-13 for Tokyo, JP-27 for Osaka) or its name, and a number. A prefecture with no row stays grey. The frame shows the four main islands and Okinawa; Okinotorishima and Minamitorishima sit outside it. Same design as the other country maps, so they sit side by side.

A choropleth map of the states, provinces or regions of Japan (ISO 3166-2 codes), each region filled by one number from your data (the "population" column). The view is cropped to longitude 122.9–146.1 and latitude 24–45.6.

A sequential colour scale from pale blue for the smallest values to deep navy blue for the largest; pinned to 500000 to 10000000, so values beyond the ends take the end colour and the colour bar says ≤ and ≥; a gradient colour bar below the map, with its labels underneath; values formatted in compact form (1.2k, 3.4M), 1 decimal; on a white canvas (#ffffff) with near-black text — a light theme; 0.6-unit hairline outlines between regions.

The title and description are left-aligned above the chart. Font: Inter (the default); a source line with a link sits at the bottom, with the chartlink badge in the corner.

Data: 2 columns — prefecture (string, "Prefecture (ISO 3166-2 code or name)"), population (number, "Population, 1 October 2025 census (preliminary)") — and 47 rows in the example "Population of Japan's 47 prefectures, 2025". Regions are named by ISO 3166-2 region codes or region names; a region with no row stays unfilled in grey, and an unknown code fails loudly with the nearest matches. Your data keeps the same column ids and every other setting comes from the template; an agent can change any of them.

Other looks of this template — dark (on a dark canvas): ast_299IcQWcIlV1ZmdkzsoDX; buckets (with the values in classes and a swatch legend): ast_0A40ZZf0NkDbOXlO7J2ns; editorial (in the editorial house style — serif type on paper, a green ramp): ast_70WdbINJLOz0RKbArafNn; categories (with a text category per region and a swatch legend): ast_rzi7cZO3BUL3cvIt0agPu; buckets-dark (with the values in classes and a swatch legend, on a dark canvas): ast_thcSRNPKQSfhuOuosjQFn; surroundings (with the land around the place drawn in grey): ast_VKJpnfRVWTbW1ckOGX6cg; categories-dark (with a text category per region and a swatch legend, on a dark canvas): ast_wUDHANjUnPGwIVH2Vqw1L; buckets-editorial (with the values in classes and a swatch legend, in the editorial house style — serif type on paper, a green ramp): ast_4s1cz8kzWOqDmBa6bhB90; dark-surroundings (on a dark canvas, with the land around the place drawn in grey): ast_y7z0h1dU5BAVMdNx3mnv8; buckets-surroundings (with the values in classes and a swatch legend, with the land around the place drawn in grey): ast_eqYgaOVYWUJp37Pn2EtT9; categories-editorial (with a text category per region and a swatch legend, in the editorial house style — serif type on paper, a green ramp): ast_nzMWHU09Tl0oIM4lMSJWn; editorial-surroundings (in the editorial house style — serif type on paper, a green ramp, with the land around the place drawn in grey): ast_oxpdd4n8rqcs6qwZOX6nD; categories-surroundings (with a text category per region and a swatch legend, with the land around the place drawn in grey): ast_hmkrGjbMqYmfZf71fnYly; buckets-dark-surroundings (with the values in classes and a swatch legend, on a dark canvas, with the land around the place drawn in grey): ast_EGF6EJ7GwrQUx1Ti5triO; categories-dark-surroundings (with a text category per region and a swatch legend, on a dark canvas, with the land around the place drawn in grey): ast_O1HFXFeM8g0YAnskMQZLR; buckets-editorial-surroundings (with the values in classes and a swatch legend, in the editorial house style — serif type on paper, a green ramp, with the land around the place drawn in grey): ast_kCM6eTJZc4WuiQOHB1MEn; categories-editorial-surroundings (with a text category per region and a swatch legend, in the editorial house style — serif type on paper, a green ramp, with the land around the place drawn in grey): ast_XSuoqnkifu7gFoVzOCkMM. On the page, switch with the toggles; an agent passes that id as the template instead.