Complex sentence: In the Japanese archipelago, leopard cats are currently restricted to the islands of Irimote and Tsushima, but fossils have been excavated from the Pleistocene period and suggest a broader distribution in the past.
Split into simpler sentences: In the Japanese archipelago, leopard cats are currently restricted to the islands of Irimote and Tsushima. Fossils excavated from the Pleistocene period suggest a broader distribution in the past.