ケロちゃん (Kero-chan) and コロちゃん (Koro-chan)
Mascot characters of コルゲンコーワ (Colgen Kowa), a cold remedy brand of Kowa Company, Limited. (Danbooru romanization: Kouwa Company) Aka. コーワのカエル (Kowa's Frogs).
Kero-chan is a girl frog, and Koro-chan is a boy frog. You can find their statues at almost every Japanese Pharmacy front.
Their names are often mistaken for Keroyon or Kerorin (Brand). (Keroyon is a TV character, inspired by Mr.Toad, a character from Kenneth Grahame's The Wind in the Willows. Kerorin is a headache medicine brand of NAIGAI yakuhin Company, Limited, well-known for advertising media called 'Kerorin wash Basins.')
See also
- Official site: http://kr2.kowa.co.jp/