Popularity and price
Median in-band sale against copies per ¥100 million of the comic market during the first run. Score is two-thirds price and one-third that share. The diagonal stripes are the tiers.
Okufu
From 奥付 (okuzuke), the colophon at the back of the book — print number and date — and 風 (fu), wind: what stays written, and what moves in the market.