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