▁pó ▁t í ▁sh ě ▁y u àn ▁sh ē ng ▁j ì ▁z h ù ), ▁also ▁known ▁as ▁the ▁Comment ary ▁on ▁the ▁treat ise ▁on ▁reb irth ▁in ▁the ▁P ure ▁Land ▁( <0xE5> <0xBE> <0x80> 生 論 <0xE8> <0xA8> <0xBB> , ▁W ǎ ng sh ē ng ▁l ù n ▁z h ù ) ▁written ▁by ▁Tal uan ▁( 4 6 7 ? – 5 4 2 ? ▁CE ). ▁ ▁How ▁the ▁k u ji ▁arrived ▁in ▁Japan ▁is ▁still ▁a ▁matter ▁of ▁debate . ▁The ▁Korean ▁variant ▁is ▁ <0xE8> <0x87> <0xA8> 兵 <0xE9> <0xAC> <0xA5> 者 <0xE7> <0x9A> <0x86> <0xE9> <0x99> <0xA3> 列 在 前 行 . ▁Some ▁contemporary ▁sch ol ars ▁assert ▁that ▁the ▁k u ji ▁arrived ▁in ▁Japan ▁via ▁China ▁through ▁J ō do - sh ū ▁and ▁Sh ug end ō ▁around ▁the ▁ 8 th ▁century , ▁if ▁not ▁much ▁later . ▁O thers ▁assert ▁that ▁they ▁were ▁introduced ▁by ▁Korea . ▁As ▁to ▁what ▁the ▁k u ji ▁consisted ▁of ▁at ▁the ▁time ▁it ▁arrived ▁in ▁Japan ▁is ▁unknown . ▁The ▁mud ras ▁are ▁found ▁in ▁T ao ist ▁material ▁as ▁well ▁as ▁in ▁Sh ug end ō . ▁Some ▁have ▁suggested ▁that ▁Sh ug end ō ▁created ▁the ▁mud ras ▁that ▁are ▁currently ▁associated ▁with ▁the ▁k u ji , ▁as ▁the ▁vast ▁majority ▁of ▁information ▁that ▁is ▁known ▁about ▁the ▁k u ji ▁comes ▁from ▁Sh ug end ō ▁literature . ▁ ▁Iss ues ▁Ku ji ▁is ▁rum