▁of ▁a ▁document ▁hint ing ▁at ▁war ▁to ▁Washington . ▁In ▁ 1 9 9 9 , ▁however , ▁Take o ▁Ig uch i , ▁a ▁professor ▁of ▁law ▁and ▁international ▁relations ▁at ▁International ▁Christian ▁University ▁in ▁Tokyo , ▁discovered ▁documents ▁that ▁pointed ▁to ▁a ▁vig orous ▁debate ▁inside ▁the ▁government ▁over ▁how , ▁and ▁indeed ▁whether , ▁to ▁notify ▁Washington ▁of ▁Japan ' s ▁intention ▁to ▁break ▁off ▁negoti ations ▁and ▁start ▁a ▁war , ▁including ▁a ▁December ▁ 7 ▁entry ▁in ▁the ▁war ▁di ary ▁saying , ▁"[ O ] ur ▁de cept ive ▁diplom acy ▁is ▁stead ily ▁proceed ing ▁toward ▁success ." ▁Of ▁this , ▁Ig uch i ▁said , ▁" The ▁di ary ▁shows ▁that ▁the ▁army ▁and ▁n avy ▁did ▁not ▁want ▁to ▁give ▁any ▁proper ▁declaration ▁of ▁war , ▁or ▁indeed ▁prior ▁notice ▁even ▁of ▁the ▁term ination ▁of ▁negoti ations   ... ▁and ▁they ▁clearly ▁pre va iled ." ▁ ▁In ▁any ▁event , ▁even ▁if ▁the ▁Japanese ▁had ▁dec oded ▁and ▁delivered ▁the ▁ 1 4 - Part ▁Message ▁before ▁the ▁beginning ▁of ▁the ▁attack , ▁it ▁would ▁not ▁have ▁constit uted ▁either ▁a ▁formal ▁break ▁of ▁diplom atic ▁relations ▁or ▁a ▁declaration ▁of ▁war . ▁The ▁final ▁two ▁paragraph s ▁of ▁the ▁message ▁read : ▁ ▁First ▁wave ▁composition ▁ ▁The ▁first ▁attack ▁wave ▁of ▁ 1 8 3 ▁plan es ▁was ▁launched ▁north ▁of ▁O ahu , ▁led ▁by ▁Commander ▁M its uo ▁F uch ida . ▁Six ▁plan es ▁failed ▁to