<Tr> <Td> Treaty of Whampoa </Td> <Td> 黃埔 條約 </Td> <Td> 1844 </Td> <Td> French colonial empire </Td> </Tr> <Tr> <Td> Treaty of Canton </Td> <Td> 中 瑞 廣州 條約 </Td> <Td> 1847 </Td> <Td> United Kingdoms of Sweden and Norway </Td> </Tr> <Tr> <Td> Treaty of Kulja </Td> <Td> 中 俄 伊犁 塔 爾 巴 哈 台 通商 章程 </Td> <Td> 1851 </Td> <Td> Russian Empire </Td> </Tr> <Tr> <Td> Treaty of Aigun </Td> <Td> 璦 琿 條約 </Td> <Td> 1858 </Td> <Td> Russian Empire </Td> </Tr>

Why did the japan sign unequal treaties with the united states