Google's April Fool's Joke for Japan

In Japan it’s April 1st already and it looks like Google Japan released an April Fool’s joke there (or a meta joke, in case the service will permanently stay): Google Dajare, in order to foster “Google’s mission ... to organize the world’s laughter”. Dajare, as Wikipedia explains, is a kind of comical Japanese wordplay, “similar in spirit to an English pun relying on similarities in the pronunciation of words to create a simple joke.” A search for 国内線 (which the Google translator says means “Domestic flights”, though that may be inaccurate) shows the onebox is live in Japan, indeed.