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Many people think of Japan as a small country, but in reality, its land area even surpasses Germany, and in terms of territory length and coastline, it is one of the few countries at the top of the world.
Traveling from Kumamoto in Kyushu to Tokyo by plane is roughly equivalent to flying from Beijing to Shanghai.
The reason we feel Japan is not large is simply because China is too big.
In Japan, every administrative division or slightly larger city has an airport, and together with the Shinkansen, conventional railroads, and highways, Japan's transportation is among the most advanced in the world.
Therefore, even traveling from Kumamoto to Tokyo, Inomata Naoki only had to leave in the morning to arrive in Tokyo around noon, just in time for lunch.
Of course, this so-called "just in time" refers only to the timing, not that he could actually join Chen Yu and Kohinata Kaori for lunch.