The small tray at the register, and why money in Japan is placed

The first thing many visitors get wrong in Japan happens within an hour of landing, at a convenience-store counter, and no one says anything about it. You hold a note out; the clerk's hand does not come up to meet it. Between you sits a shallow tray, ridged rubber or grey plastic, the size of a paperback.

What the tray is for

The tray is a karuton (カルトン), from the French carton, and it sits at almost every register in the country — konbini, pharmacy, ticket window, hotel front desk. Money goes into it rather than into the clerk's hand. The clerk lifts the note, counts it where you can see, and the exchange has a surface it happens on.

Part of the reason is coin-shaped. Japan still runs on 1-, 5-, 10-, 50-, 100- and 500-yen pieces, and a lipped tray keeps them from rolling. The rest is that the tray spares two strangers' hands from touching and leaves nothing to argue about.

Both hands, and the half second after

Change comes back the other way, and often by hand: notes offered with both, or with one palm braced under the opposite wrist, then coins and receipt. The gesture is small enough to miss entirely. If you take it with two hands, or lay one hand under the other, you have answered in the same register, and you will feel the counter relax.

The tray is not a barrier. It is a place to set things down so that both people can see them.

お釣りを受け取るとき、少しだけ両手を添える。それだけで、その場の空気は変わる。

Where the rule loosens

Market stalls are freer — at Nishiki in Kyoto or the outer stalls at Toyosu, a vendor with wet hands will take a coin straight from yours. Taxis usually have a small tray beside the meter. An IC card such as Suica or ICOCA removes the question entirely, and now covers trains, buses and most konbini.

One habit is worth carrying regardless: look down before you hand anything over. If there is a tray, use it.