Japan is mostly mountans which is why 68.5% of the country is covered in forests. Where farms cover 50% of China and 12% of Japan.<p>Now China has more land at higher elevation and less rainfall on the western half, but elevation is only an issue at steep gradients or extreme elevations. <a href="https:&#x2F;&#x2F;commons.m.wikimedia.org&#x2F;wiki&#x2F;Atlas_of_the_People%27s_Republic_of_China#&#x2F;media&#x2F;File%3AChina_topo.png" rel="nofollow">https:&#x2F;&#x2F;commons.m.wikimedia.org&#x2F;wiki&#x2F;Atlas_of_the_People%27s...</a>