这就是为什么一些中国人说日本人从不为战争感到遗憾。它感到遗憾的是，自己被打败了。据我所知，德国没有在巴黎屠杀30万法国人。在占领法国期间，它也没有对法国人进行不道德的人体实验。
Geopolitical reasons:
地缘政治原因：
France and Germany need to stand together to build a strong and unified Europe. China and Japan have different needs. On the contrary, separating the two is beneficial to the West (that is, the United States). After the outbreak of the Korean War, the United States even helped Japan's right wing to remain in power, because it was worried that the Soviet Union might have too much influence on East Asia through the left party.
法国和德国需要站在一起建设一个强大和统一的欧洲。中国和日本的需求并不相同。相反，将这两者分开对西方（即美国）有利。朝鲜战争爆发后，美国甚至帮助日本右翼继续掌权，因为它担心苏联可能会通过左派对东亚产生太大影响。
Now you know why China can't shake hands with Japan like France and Germany.
现在你知道为什么中国不能像法国和德国那样与日本握手言和了。
中国网友瑞诺张的回答
Quite simply, France and Germany are closer and have more in common than China and Japan.
很简单，法国和德国比中国和日本更接近，也有更多的共同点。
1. France and Germany are both Christian countries and part of European culture. Both are seriously (more or less) influenced by Greek and Roman culture.
1.法国和德国都是基督教国家，是欧洲文化的一部分。两者都严重（或多或少）受到希腊和罗马文化的影响。
2. France and Germany have always shared a common border, territorial change and immigration. In 1700, 20% of Berlin's population spoke French (Huguenot).
2.法国和德国一直有着共同的边界，领土变化和移民往来。1700年，柏林20%的人口说法语（胡格诺派）。
3. France and Germany both originated from the Frankish Empire and recognized Charlemagne as the founder of their respective countries.