Japanese “free of charge” button emoji 🈚 is part of the Symbols and Alphanumeric Symbols emojis. On some systems it can be accessed by using :japanese_free_of_charge_button:, :ja_free_of_charge: or :u7121: shortcodes.
It was approved as part of Unicode in 2010 so it should be displayed properly on all devices.
Tags: Ideograph, Japanese, Japanese “free of charge” button, “free of charge” and 無