Yes they did
China Japan Korea
Japan is east side of China.
China could not fight Japan.
if you are talking about sharks yes they are popular to eat in some countries such as china or japan etc.
The Answer Is North.
China
China Japan Usa
Japan, China, India, Italy, America, several countries in Asia.
To some extent some tunnels were used; but the war in China was not known for that use. Trenches were also used; but again, the war in China was not known for that. WW1 was known as a "trench war", as well as alot of tunnelling.
Yen is the currency of Japan, China's currency is called "Renminbi", or "Yuan"
China and Japan are the places where you find most of the robots being used, but in most automobilie factories there are robots in use. So they're not only in China and Japan. The more humanoid robots are primarily in China and Japan. Also there is robotics comititions where students build robots and battle them in multiple countries.