Rag time
No time for excitement today, so here is the least exciting information I have to hand: the ten types of clothing from which Dōgen suggested his disciples make their robes:
- 牛嚼衣, goshaku e: Clothing chewed by cows
- 鼠噛衣, soshi e: Clothing gnawed by rats
- 火焼衣, kashō e: Clothing burnt by fire
- 月水衣, gessui e: Clothing used for menstruation-related purposes (literally "moonwater clothing")
- 産婦衣, senbu e: Clothing used for childbirth-related purposes
- 神廟衣, jinmyō e: Clothing discarded after shrine-related use
- 塚間衣, chogen e: Clothing discarded after grave-related use
- 求願衣, kugan e: Clothing discarded after prayer-related use
- 王職衣, ōshiki e: Clothing donated by a king or noble
- 往還衣, ōgen e: Clothing used as a corpse's shroud (literally "going-home clothing")
The idea, as you have no doubt deduced, was to make use of rags that absolutely no-one could have any attachment to. This minimized one's effect on the world, taught one humility, and also ensured a real bargain. You think last season's tube tops are cheap at Uniqlo, try rummaging through the "chewed by cows" display.
Collectively these are known as funzō e, "clothing of dung-sweepings," allegedly corresponding to Sanskrit pamsukula. The Japanese pronunciations listed above are all taken with gratitude from the linked site. They seem to use the Wu readings, which isn't surprising for Buddhist jargon. But I can't find anyone else that will support chogen for 塚間, so I'll call 'em tentative for now.
無名酒:
How serious was he about these categories (particularly category 4). The Blood Bowl Sutra was already well attested in Japan by this point (although I forget what our earliest copy that includes the "damned even if you don't" provision--making it clear that menstrual blood, like placental, sends you straight to the Blood Pool Hell).
Actually, category 7 would be much less problematic from a pollution standpoint. Traditionally death-pollution decreases over time, and by the time an abandoned corpse is down to the bones, you need a full court session, legal opinions, and a divination to determine if that tibia dropped on a shrine/temple building will be a problem or not.