▁Da os ui ▁was ▁instrument al ▁in ▁teaching ▁Sa ich ō ▁about ▁Ti ant ai ▁methods ▁of ▁med itation , ▁mon astic ▁discipline ▁and ▁orth odox ▁teach ings . ▁Sa ich ō ▁remained ▁under ▁this ▁instruction ▁for ▁approximately ▁ 1 3 5 ▁days . ▁ ▁Sa ich ō ▁spent ▁the ▁next ▁several ▁months ▁copying ▁various ▁Buddh ist ▁works ▁with ▁the ▁intention ▁of ▁bringing ▁them ▁back ▁to ▁Japan ▁with ▁him . ▁While ▁some ▁works ▁existed ▁in ▁Japan ▁already , ▁Sa ich ō ▁felt ▁that ▁they ▁suffered ▁from ▁copy ist ▁errors ▁or ▁other ▁defect s , ▁and ▁so ▁he ▁made ▁fresh ▁copies . ▁Once ▁the ▁task ▁was ▁completed , ▁Sa ich ō ▁and ▁his ▁party ▁returned ▁to ▁N ing bo , ▁but ▁the ▁ship ▁was ▁har bor ed ▁in ▁F uz hou ▁at ▁the ▁time , ▁and ▁would ▁not ▁return ▁for ▁six ▁weeks . ▁ ▁During ▁this ▁time , ▁Sa ich ō ▁went ▁to ▁Y uez hou ▁( 越 州 , ▁modern - day ▁Sh a ox ing ) ▁and ▁sought ▁out ▁texts ▁and ▁information ▁on ▁V aj ray ana ▁( Es oter ic ) ▁Buddh ism . ▁The ▁Ti ant ai ▁school ▁originally ▁only ▁util ized ▁" m ixed " ▁() ▁cer emon ial ▁practices , ▁but ▁over ▁time ▁es oter ic ▁Buddh ism ▁took ▁on ▁a ▁greater ▁role . ▁By ▁the ▁time ▁Sa ich ō ▁had ▁arrived ▁in ▁China , ▁a ▁number ▁of ▁Ti ant ai ▁Buddh ist ▁cent ers ▁provided ▁es oter ic ▁training , ▁and ▁both ▁Sa ich ō ▁and ▁G