What major international conference did Japan seek to influence in 1930 regarding naval ratios?

In 1930, Japan sought to influence the London Naval Conference, which was primarily focused on naval armament limitations and the ratio of naval power among the major countries—most significantly the United States, the United Kingdom, and Japan itself. The conference arose from the need to prevent an arms race following World War I and aimed to maintain a balance of naval power through agreed-upon ratios for battleships and aircraft carriers.

Japan's participation was driven by its desire to be recognized as a major naval power on the global stage, and it aimed to secure a more favorable ratio of naval strength compared to that of the United States and Britain. The agreements made during the London Naval Conference reflected Japan’s efforts to assert itself in international affairs while simultaneously accommodating its security needs.

The other options, while relevant to disarmament and international relations, do not specifically pertain to Japan's major influence concerning naval ratios in the way that the London Naval Conference does. The Geneva Disarmament Conference focused on broader disarmament issues, the Washington Conference occurred earlier in the 1920s and set initial naval ratios, and the League of Nations, while significant for international diplomacy, was not a conference specifically aimed at naval ratios like the London Naval Conference.