Japanese “monthly amount” button emoji 🈷️ is part of the Symbols and Alphanumeric Symbols emojis. On some systems it can be accessed by using :japanese_monthly_amount_button:, :ja_monthly_amount: or :u6708: shortcodes.
It was approved as part of Unicode in 2010 so it should be displayed properly on all devices.
Tags: Ideograph, Japanese, Japanese “monthly amount” button, “monthly amount” and 月