It uses a cartoon rabbit and features three different scenarios - love, apology and loneliness.
Dare Koslow, Crown Greeting's marketing director, said: "There is not an established card market (in Japan) and so we used pictures as well as words to help people express their feeling."
"We essentially took a 360 degree solution from Ogilvy, which involved print, mass media, television and mobile, which is a very well-established medium in Japan. The campaign was tied to the i-mode site through posters."
Koslow said more than 100,000 greeting have been sent via Hallmark Hiya since its launch. He added that sending emails was the most popular function on i-mode, and the "sending of cards annually per capita in Japan was one versus about 28 in the US".