<Tr> <Td_colspan="3"> Population </Td> </Tr> <Tr> <Td> </Td> <Td> 1920 est . </Td> <Td> 77,700,000 </Td> </Tr> <Tr> <Td> </Td> <Td> 1940 est . </Td> <Td> 105,200,000 </Td> </Tr> <Tr> <Td_colspan="2"> Currency </Td> <Td> Japanese yen, Korean yen, Taiwanese yen, Japanese military yen </Td> </Tr>

Why did the samurai lose control of japan at the the beginning of the 20th century