Yamashi Kasa ★★★

Taken all the way down to base materials, one Yamashi Kasa is 3 crafting steps deep and needs 5 intermediates — Black Willow Lumber ×4, True Linen ×2, Veteran Tree Sap ×2 and 2 others — which resolve to 12 distinct raw materials totalling 43 units, plus 31 crystals.

That bill outweighs 12,178 of the 13,602 recipes tracked here and 1,293 of the 1,552 Carpenter ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 27 are burned by the intermediates, so the real crystal cost is 8 Wind Cluster, 6 Ice Cluster, 6 Lightning Cluster and 3 other kinds.

The chain crosses three disciplines — Carpenter to Lv 70, Alchemist to Lv 70 and Weaver to Lv 70 — so no single class can finish it unaided.

7 of the 12 raw materials come out of the ground, and 3 of them are time-gated: Black Willow Log (4:00, 16:00), Hardened Veteran Tree Sap (4:00, 16:00) and 1 other. The widest gap between consecutive opening times is 10 Eorzean hours, about 29 real-world minutes.

Of the intermediates, Twinthread has the widest use: 109 recipes call for it, spanning six of the eight crafting classes.