Double H or WH is a popular idol duo and mascot characters prominently shown on the subway public service announcements’s “Today’s Slogan”. The duo is made up of Hibari Isora and Hikari Utada.
Hibari’s name is likely a reference to the famous enka singer and actress Hibari Misora.
Hikari shares her name with famous Japanese/American singer/songwriter Hikaru Utada.
Two is better than One
Working Together is Beautiful
Don’t play with Straps
Molest and Be Arrested
Garbage Goes in the Garbage Bin
Beware of Baggage Theft
Stop Physical Odor