Discover the fascinating world of Yonenaga's Spiny-rat (*Tokudaia osimensis*), a medium-sized rodent native to Japan's lush Okinawa and Amami-Oshima islands. Primarily nocturnal and an adept seed disperser, this unique species is vital to its tropical forest ecosystem, yet faces vulnerabilities due to habitat loss. Explore its intriguing adaptations and crucial role in maintaining biodiversity in its natural habitat.