Googleが検索サービスで Unicode 5.1 をサポートしたとのことだが、 このUnicode 5.1.0のドキュメントを見ていたら、麻雀牌が文字セットに追加されていることを知る。

Mahjong Tile Symbols: U+1F000—U+1F02F Mahjong tile symbols encode a set of tiles used to play the popular Chinese game of Mahjong. The exact origin of the game is unknown, but it has been around since at least the mid-nineteenth century, and its popularity spread to Japan, Britain and the US in the early twentieth century. There is some variation in the set of tiles used, so the Unicode Standard encodes a superset of the tiles used in various traditions of the game. The main set of tiles is made up of three suits with nine tiles each: the Bamboos, the Circles and the Characters. Additional tiles include the Dragons, the Winds, the Flowers and the Seasons.

出典: http://www.unicode.org/versions/Unicode5.1.0/

注意: 今回の改訂で最も重要なのは異体字セレクタの漢字への適用です。

A major feature of Unicode 5.1.0 is the enabling of ideographic variation sequences. These sequences allow standardized representation of glyphic variants needed for Japanese, Chinese, and Korean text.

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