抄録
TAKEBE Katahiro (1664-1739) was a famous mathematician in the Edo period in Japan and was an outstanding pupil of SEKI Takakazu (?-1708) who was an authority on Japanese traditional mathematics. The Enri Kohai-jutsu has been thought to be a book by TAKEBE. One of the manuscripts is preserved in the Hayashi collection of Tohoku University's library (call number : Hayashi 911) and there is another manuscript in the Boso sugaku collection of Natural History Museum and Institute, Chiba (call number : Boso sugaku-collection No. 178). Differences can be found between them. They are especially different in the second half.
