This Emoji means “prohibit, restrict or forbid” in Japanese.
CJK Ideographs are characters used in Chinese, Japanese and Korean languages. Their writing systems all completely or partly use Chinese characters.
Japanese โProhibitedโ Button was approved as part of Unicode 6.0 in 2010 under the name โSquared CJK Unified Ideograph-7981โ and added to Emoji 1.0 in 2015.
๐ฒ Japanese Sign Meaning โProhibitedโ