Nations in the Asia-Pacific region are modernizing their naval fleets, and many are choosing to use submarines as the centerpiece of these plans. China, one of the most influential nations in the region, has upgraded its submarine force, and it is important to analyze the impact this modernization effort will have on the stability of the region. India, Japan, and the United States are closely watching the Peoples Liberation Army Navys PLANs submarine force to understand better Chinas intentions writ large, and the implications they have for security. All three nations have reacted in response to the PLANs modernization goal. This thesis concludes that the most effective policy going forward would be a balanced combination of both hard and soft hedging including dialogue with the PLAN to defend allied security interests but also to provide avenues for promoting future regional stability.