Keep this for you! In Japan and China, the symbol is used to point to a secret.
The Japanese 'Secret' button emoji was introduced in 1995 and released as part of the Unicode 11.0 standard. This emoji can be found under the symbols category. Because the Japanese 'Secret' button emoji has been around for quite some time, it should display correctly in the majority of operating systems.

Here you'll find a range of emojis on how they will look using different operating systems. Each company will design an emoji according to their own style. Here we have listed the most popular platforms around to see how the emoji will look on their screens.

Short Codes:

:secret:

Hex Code:

㊙️

Decimal Code:

㊙️

Punycode:

xn--pqk

URL Escape Code:

%E3%8A%99%EF%B8%8F

JavaScript & JSON:

\u3299\ufe0f

CSS Code:

content: '\03299\0FE0F';