If by 'noisy' meaning constant foray into our maritime and aerial domain, then, yes, you are precisely correct. In the Spirit of the Treaty of Peace and Friendship between Japan and the PRC , which was ratified in 1978, we had agreed that both parties will not try to impress upon each other or in Asia-Pacific designs of hegemony.
China has reneged on this by not only making territorial claims of the Senkaku Islands, but also in its 9-Dashed Claim of the South China Sea, which effectively constrains the EEZs of other nations in South East Asia. This effectively is in violation of our 1978 Treaty where in which both parties, Japan and China , would refrain from acts of hegemony that would disturb regional stability.
Thus, in response to such provocations, Japan has been forced to re-evaluate our Constitution in regards to national defense and the defense of our partners that may be affected by these so called claims.
And I am being quite direct about this.