<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2018) (Learn how and when to remove this template message) </Td> </Tr> <Table> <Tr> <Th> History of Japan </Th> </Tr> <Tr> <Td> </Td> </Tr> <Tr> <Td> Periods (show) <Table> <Tr> <Td> Paleolithic </Td> <Td> before 14,000 BC </Td> </Tr> <Tr> <Td> Jōmon </Td> <Td> 14,000--300 BC </Td> </Tr> <Tr> <Td> Yayoi </Td> <Td> 300 BC--300 AD </Td> </Tr> <Tr> <Td> Kofun </Td> <Td> 300--538 </Td> </Tr> <Tr> <Td> Asuka </Td> <Td> 538--710 </Td> </Tr> <Tr> <Td> Nara </Td> <Td> 710--794 </Td> </Tr> <Tr> <Td> Heian </Td> <Td> 794--1185 </Td> </Tr> </Table> <Table> <Tr> <Td> Kamakura </Td> <Td> 1185--1333 </Td> </Tr> <Tr> <Td> Kenmu Restoration </Td> <Td> 1333--1336 </Td> </Tr> <Tr> <Td> Muromachi (Ashikaga) <Ul> <Li> Nanboku - chō </Li> <Li> Sengoku </Li> </Ul> </Td> <Td> 1336--1573 </Td> </Tr> <Tr> <Td> Azuchi--Momoyama <Ul> <Li> Nanban trade </Li> </Ul> </Td> <Td> 1573--1603 </Td> </Tr> <Tr> <Td> Edo (Tokugawa) <Ul> <Li> Sakoku </Li> <Li> Convention of Kanagawa </Li> <Li> Bakumatsu </Li> </Ul> </Td> <Td> 1603--1868 </Td> </Tr> <Tr> <Td> Meiji <Ul> <Li> Boshin War </Li> <Li> Restoration </Li> <Li> First Sino - Japanese War </Li> <Li> Boxer Rebellion </Li> <Li> Russo - Japanese War </Li> </Ul> </Td> <Td> 1868--1912 </Td> </Tr> <Tr> <Td> Taishō <Ul> <Li> World War I </Li> </Ul> </Td> <Td> 1912--1926 </Td> </Tr> <Tr> <Td> Shōwa <Ul> <Li> Financial crisis </Li> <Li> Militarism </Li> <Li> World War II </Li> <Li> Occupation </Li> <Li> Economic miracle </Li> <Li> Post-occupation </Li> <Li> Bubble Economy </Li> </Ul> </Td> <Td> 1926--1989 </Td> </Tr> <Tr> <Td> Heisei <Ul> <Li> Lost Decade </Li> </Ul> </Td> <Td> 1989--present </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> Topics (hide) <Ul> <Li> Currency </Li> <Li> Earthquakes </Li> <Li> Economy </Li> <Li> Education </Li> <Li> Empire </Li> <Li> Historiography </Li> <Li> Military </Li> <Li> Naval </Li> <Li> Post-war </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> Glossary </Li> <Li> Timeline </Li> </Ul> </Td> </Tr> <Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th> History of Japan </Th> </Tr> <Tr> <Td> Periods (show) <Table> <Tr> <Td> Paleolithic </Td> <Td> before 14,000 BC </Td> </Tr> <Tr> <Td> Jōmon </Td> <Td> 14,000--300 BC </Td> </Tr> <Tr> <Td> Yayoi </Td> <Td> 300 BC--300 AD </Td> </Tr> <Tr> <Td> Kofun </Td> <Td> 300--538 </Td> </Tr> <Tr> <Td> Asuka </Td> <Td> 538--710 </Td> </Tr> <Tr> <Td> Nara </Td> <Td> 710--794 </Td> </Tr> <Tr> <Td> Heian </Td> <Td> 794--1185 </Td> </Tr> </Table> <Table> <Tr> <Td> Kamakura </Td> <Td> 1185--1333 </Td> </Tr> <Tr> <Td> Kenmu Restoration </Td> <Td> 1333--1336 </Td> </Tr> <Tr> <Td> Muromachi (Ashikaga) <Ul> <Li> Nanboku - chō </Li> <Li> Sengoku </Li> </Ul> </Td> <Td> 1336--1573 </Td> </Tr> <Tr> <Td> Azuchi--Momoyama <Ul> <Li> Nanban trade </Li> </Ul> </Td> <Td> 1573--1603 </Td> </Tr> <Tr> <Td> Edo (Tokugawa) <Ul> <Li> Sakoku </Li> <Li> Convention of Kanagawa </Li> <Li> Bakumatsu </Li> </Ul> </Td> <Td> 1603--1868 </Td> </Tr> <Tr> <Td> Meiji <Ul> <Li> Boshin War </Li> <Li> Restoration </Li> <Li> First Sino - Japanese War </Li> <Li> Boxer Rebellion </Li> <Li> Russo - Japanese War </Li> </Ul> </Td> <Td> 1868--1912 </Td> </Tr> <Tr> <Td> Taishō <Ul> <Li> World War I </Li> </Ul> </Td> <Td> 1912--1926 </Td> </Tr> <Tr> <Td> Shōwa <Ul> <Li> Financial crisis </Li> <Li> Militarism </Li> <Li> World War II </Li> <Li> Occupation </Li> <Li> Economic miracle </Li> <Li> Post-occupation </Li> <Li> Bubble Economy </Li> </Ul> </Td> <Td> 1926--1989 </Td> </Tr> <Tr> <Td> Heisei <Ul> <Li> Lost Decade </Li> </Ul> </Td> <Td> 1989--present </Td> </Tr> </Table> </Td> </Tr>

What factor has limited japan's economy throughout its history