singapore unite state step pressure china saturday rein action south china sea top defense officials underline washington military superiority vow remain main guarantor asian security decades come defense secretary ash carter say u.s. approach asia-pacific remain one commitment strength inclusion also warn china provocative behavior south china sea action china reclaim land scarborough shoal outcrop dispute sea would consequences carter say hope development occur result action take unite state ... others region would effect increase tensions isolate china carter tell shangri-la dialogue regional security forum singapore unite state remain powerful military main underwriter security region decades come doubt that south china sea become flashpoint unite state increase focus asia-pacific president barack obama pivot china project ever great economic political military power region carter however say would welcome china participation principled security network asia forward think statesmen leaders must ... come together ensure positive principled future say add network envisage could also help protect russia worry action grow strategic impact climate change deputy head china delegation forum say unite state reduce provocative exercise patrol region say attempt isolate china would fail time cooperation common security rear admiral guan youfei tell reporters u.s. action take side agree many countries hope u.s. also listen countries asian leaders say situation south china sea view concern across region countries region need recognize share prosperities enviable rate growth region enjoy past decades put risk aggressive behavior action one us indian defence minister manohar parrikar tell forum japanese defence minister gen nakatani say country would help southeast asian nations build security capabilities deal call unilateral dangerous coercive action south china sea south china sea witness large-scale rapid land reclamation build outposts utilization military purpose nakatani say country outsider issue chinese official respond say japan careful interfere stir problems waterway china foreign ministry also weigh regard u.s. japanese comment counties outside region stick promise make thoughtless remark issue territorial sovereignty ministry say statement trillions dollars trade year pass south china sea home rich oil gas fish resources besides china vietnam philippines malaysia brunei taiwan claim area rise tensions fuel increase security spend region uncertainty china future trajectory arguably main drive concern possible military competition future malaysian defence minister hishammuddin hussein say carter say decades critics predict impend u.s. withdrawal region would happen region home nearly half world population nearly half global economy remain consequential america security prosperity apparent counter america-first policies expound prospective republican presidential candidate donald trump include suggestions u.s. troop withdraw asia carter stress bipartisan support continue engagement shangri-la dialogue hold ahead significant rule expect come weeks case file philippines international court arbitration challenge china south china sea claim beijing vow ignore unite state lobby asian countries back judge statement rule must bind call echo japan saturday china lobby side support position court lack jurisdiction case u.s. flex muscle asia worry south china sea row