The Chinese Foreign Ministry on Tuesday refuted the Japanese government allegation that China is involved in "dangerous" maritime activities, saying Chinese maritime operations are based on international and domestic laws.
"The criticism (from Japan) is not warranted," Foreign Ministry spokeswoman Hua Chunying said.
Hua made the remarks in response to an annual report released by Japan's Defense Ministry earlier in the day that China's activities in the sea and the air include "dangerous actions that could cause a contingency situation."
"China conducts normal maritime activities in accordance with international and domestic laws," Hua said.
The Japanese Defense Ministry's White Paper said Japan is concerned about China's potentially dangerous maritime activities and Beijing should act according to international rules rather than by using force.
Citing a January incident in which Japan says a Chinese navy frigate locked weapons' radar on a Japanese Maritime Self-Defense Force destroyer in the East China Sea, the paper criticized Beijing for denying use of the radar and accused it of giving false explanations over the incident.
Tokyo and Beijing have been at odds over the Japanese-controlled Senkaku Islands in the sea and tensions have increased since the government purchased three of the five islands last September from their private Japanese owner.