"Red Five" mahjong tiles

[Porges]

Japanese (Rīchi) Mahjong optionally switches one five in each suit to be a red five. When discussing rules or strategy in text, it is useful to be able to refer to them directly, as they have a semantic difference (they are worth extra points).

Here are two screenshots from Daina Chiba's book "Riichi Book 1":

Petitions

N/A

Proposals

N/A

Specific References

• Riichi Book 1

Standard References

• Unicode Technical Standard 51 “Unicode Emoji” (beta)
• How to propose emojis to Unicode
• How to propose other additions or changes to Unicode (required form, email address: docsubmit＠unicode.org)
• Unicode document submission form

[Porges]

Note that in some variants other tiles (3s, 7s) are marked red as well/instead of the 5s.