Tomonaga Sōichi came to Takamatsu in 1923 with a sootman’s lungs, a marriage into a paper family, and one conviction: that ink should be ground where the stone is quarried. He set his first basin in a storehouse two streets from the harbor, and the house has not moved since.
The water test began as thrift. A stick that disperses evenly is a stick that was kneaded honestly, so each morning the first grind of the day is floated on still water and read like a pulse. Around 1931 the readings turned beautiful, and the family began to keep them. There are near three thousand proof sheets in the cellar now, one for almost every working morning since then.
Today the table belongs to Tomonaga Kanae, fourth of her name in the ledger. She grinds, she floats, she pulls. The vat at the top of this page is hers, and the pattern you disturbed was this morning’s reading.