▁the ▁k ok ub un ji ▁system , ▁and ▁lod ged ▁a ▁protest . ▁Sa ich ō ▁composed ▁the ▁, ▁which ▁str essed ▁the ▁significance ▁of ▁the ▁Bod his att va ▁Pre cept s , ▁but ▁his ▁request ▁was ▁still ▁rejected ▁until ▁ 7 ▁days ▁after ▁his ▁death ▁at ▁the ▁age ▁of ▁ 5 6 . ▁ ▁Rel ations hip ▁with ▁K ū ka i ▁ ▁Sa ich ō ▁tra ve led ▁to ▁China ▁along ▁with ▁a ▁number ▁of ▁other ▁young ▁mon ks , ▁one ▁of ▁whom ▁was ▁named ▁K ū ka i . ▁Sa ich ō ▁be fri ended ▁him ▁during ▁his ▁trip ▁to ▁China ▁who ▁tra ve led ▁with ▁him ▁going ▁and ▁coming . ▁This ▁turned ▁out ▁to ▁be ▁p iv otal ▁to ▁the ▁future ▁development ▁of ▁Buddh ism . ▁, ▁and ▁like wise ▁returned ▁with ▁es oter ic ▁( t ant ric ) ▁Buddh ist ▁texts . ▁Sa ich ō ▁was ▁ent ran ced ▁with ▁the ▁new ▁material ▁and ▁wanted ▁to ▁learn ▁more . ▁On ▁the ▁trip ▁back ▁he ▁found ▁that ▁Ku ka i ▁had ▁studied ▁these ▁teach ings ▁in ▁depth ▁and ▁had ▁an ▁entire ▁library ▁of ▁v aj ray ana ▁materials . ▁This ▁friendship ▁would ▁influence ▁the ▁future ▁of ▁T end ai . ▁ ▁It ▁was ▁Sa ich ō ▁who ▁performed ▁the ▁ab hi ṣ e ka , ▁or ▁init iat ory ▁rit ual , ▁for ▁the ▁court . ▁ ▁Ex oter ic ▁syn cret ic ▁tradition ▁versus ▁es oter ic ism ▁▁ ▁Thus ▁es oter ic ▁Buddh ism