Sign for Heart and Heart ハートアンドハート, a soapland ソープランド in the Noge entertainment district of Yokohama. (Originally I had erroneously identified this as a love hotel).
For more about soaplands, see: A walk in the sex park: Yoshiwara and the Tokyo bordello
For more about love hotels, see: Sleeping with Hello Kitty: travel sites bring foreigners to Japan’s love hotels
the tokyo files 東京ファイル 