Gold is heavy. You have known that since you were a child. Here, someone sets a leaf of gold down beside your hand, and your first instinct is to stop breathing.
How thin is it? Hold it up to the light and the light comes through. Breathe out, even gently, and it drifts away on its own. Thinness like that cannot be beaten anywhere: damp air, water that is clean and restrained, and centuries of protection under the Kaga domain let a craft this exacting — exacting almost past reason — take root in one city alone, Kanazawa. Nearly all the gold leaf used in Japan goes out from here.
Then it is your hands' turn. The vessel sits in front of you and you have to lay that weightless thing onto it. A tremor in your fingers and it creases; a little static in your clothes and it flies to your cuff; even the rhythm of your breathing becomes a variable. You find yourself holding your breath, slowing your hands to a speed that feels unfamiliar even to you. The moment it goes down, the whole vessel lifts into brightness — the room usually falls silent for a second, then laughs all at once.
Most crafts are understood by being explained. This one is understood by the body first. You need not memorize the region, the stages, the dates; your fingers have already worked out for you why this can only be done here.
It is not fussy about who does it. One person can do it, and a whole party can sit down in a row and do it together — which is exactly why it belongs at the front of an itinerary. The warmth rises from each person's own hands rather than coming down at them from a podium. Almost nobody fails at it, and the photographs come out bright by nature.
You leave holding a vessel you gilded yourself. What stays longer is something else: that once, for a leaf of gold too light to have any weight, you held your breath.