None. Ocean. But you are probably wanting North and South Korea.
Korea (both North and South) is between China and Japan.
Japan
japan
Japan.
Japan lies to the northeast of China, and Taiwan is directly east of China.
Japan
China is the closest country to Japan that starts with a c. South Korea and Russia are far closer to the main mass of Japan than mainland China, though there are some disputed areas between the two countries.
Japan has a better technology.
Japan's, China's, and others.
It is difficult to determine the country with the best education system as each country excels in different areas. However, countries like Finland, South Korea, and Singapore are often seen as having strong education systems due to high student performance on international assessments.
China
Yes