The story
Fiction and adapted settings written by Akitsora Gaming for this title, including invented dialogue and events. This is not a historical or folklore reference. The rules and specification tables define the gameplay and math.
Once the rainy season ends, the drying yard fills with bamboo sieves — salt, sunlight and time turn green plums into umeboshi.
I. Choosing the plums
The keeper picks them one by one: thin skin, thick flesh, no bruises. They are soaked, rubbed with coarse salt and laid down in a great jar.
Red shiso leaves, kneaded first, go in with them, and slowly the plums turn red.
II. Sun-drying
The cured plums are set out on bamboo sieves, dried by day and brought in at night, until the skins wrinkle and a white bloom of salt shows through.
The weight of that red row on the sieve is the weight of the spin — the number on the plum knot (base game ×2 to ×20).
III. Into the storehouse
Gather 4 drying tags and two paper doors slide apart onto the storehouse: jar after jar tied with red cord and capped with cloth, lined up on wooden racks. Over the next 15 spins the multiplier keeps growing (×2 to ×500).
3 more tags add 5 more spins.
IV. Presenting the plums
When a jar is finally opened, the keeper lifts out a box of umeboshi, glossy red under a fine dusting of salt — a whole summer of sunny days.