>>283246534
I have a note for the tube here from Furinkan:

"The bamboo weapon has an inscription on it in Chinese. It says "the six faculties are as pure as the decree" (六根清净急急如律令). The "six faculties" are likely a reference to "ayatana" a Buddhist concept often translated as "sense base" or "sense sphere". There are six internal senses and then an object associated with that sense.
eye and visible objects
ear and sound
nose and odor
tongue and taste
body and touch
mind and mental objects"

The paper doll referenced here is the katashiro referenced by the chapter title. I am a little confused about this, but I'll relate it on another page. The "wellspring of life" bit seems to be VIZ inserting some context as to what the definition of the Tanden or Dantian is. Though he did clarify its position in Japanese as well.