Answer:
The nation that was especially worried about Japan's victory in the Sino-Japanese War was Russia.
Explanation:
Russia was especially worried about japans victory in the Sino Japanese war, In this battle, China was supported by Russia as they did not want the Japanese coming into the Chinese mainland.
The First Sino-Japanese War was a conflict between the Qing dynasty of China and the Empire of Japan primarily over influence in Joseon Korea. After more than six months of unbroken successes by Japanese land and naval forces and the loss of the port of Weihaiwei, the Qing government sued for peace in February 1895.
The Second Sino-Japanese War (1937–1945) was a military conflict that was primarily waged between the Republic of China and the Empire of Japan.
Mainland is defined as "relating to or forming the main part of a country or continent, not including the islands around it [regardless of status under territorial jurisdiction by an entity]."
To learn more about Sino Japanese war here:
https://brainly.com/question/26733520
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