Japan is 2,555 times larger than Thousand Oaks, California.
Area: 377,915 km2 World Factbook
Population: 127,103,388 (July 2014) World Factbook
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south. Wikipedia
Area: 148 km2 calculated
Thousand Oaks is an affluent city in southeastern Ventura County, California, part of the Greater Los Angeles Area in the United States. Thousand Oaks is located approximately 35 miles from Downtown Los Angeles and is also less than 15 miles from the Los Angeles city neighborhood of Woodland Hills. Wikipedia