About This Trend

地図の日 (Map Day) is a Japanese observance commemorating the day 伊能忠敬 (Inō Tadataka) began his nationwide survey to create the first comprehensive map of Japan.

The trend is currently active as April 19th marks the anniversary of Inō Tadataka's 1800 departure to measure the land, leading to the creation of Japan's first accurate map. .

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