Around 11% of Japan’s land is “unclaimed” — plots that cannot be traced back to their owners. The figure is expected to jump to 19% by 2040, according to an expert study group. To put that into perspective, currently 41,000 sq km of land, equivalent to the Japanese island of Kyushu, or slightly smaller than Taiwan, is unclaimed. That will expand to 72,000 sq km, equivalent to the bigger Japanese island of Hokkaido, or larger than Sri Lanka.