Donation box
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Donation box (賽錢箱 chokinbako?) is a common item in Shinto shrines, used to collect donations. In essence, it is a standard coin box, save for the fact that the top cover is a grate. This design allows coins to be just thrown in, while still preventing the money to be retrieved easily by some sneaks. Those with better designs typically have grates made of round bars, or have its top surface act as a slop, allowing the money to slide into the box easily.
Many cheaper versions can be bought at a store, some as low as 100 yen, for an alternative for a piggy bank, as well as used for busking.