Japan's Prime Minister Shinzo Abe says other countries want Japan to adopt a more assertive leadership role in Asia to counter the growing power of China.
Mr Abe told the Wall Street Journal there were "concerns that China was trying to change the status quo by force, rather than by the rule of law".
Relations between China and Japan have been strained over recent years.
China said on Saturday that if Japan shot down Chinese drones, this would be considered "an act of war" by Beijing.
The statement was referring to reports that Mr Abe had approved defence plans that envisaged using air force planes to shoot down unmanned Chinese aircraft in Japanese airspace.
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