Kawaii means cute, and cuteness rules Japan. Hello Kitty, in Japan referred to as Kitty-chan (-chan being an endearing suffix, used e.g. for small girls) is just the tip of the iceberg.
Everything has cute mascots in Japan, even government agencies. Even serious matters are preferably communicated by a cute character. This seems a bit surprising to us, but it is surely entertaining. Let me give a few examples I personally encountered. There’s the fish warning of earthquakes. Another example is the cat that is informing about sexual harassment at Tokyo University (every employee received a little card like this).
Two small foxes ask us to lower our CO2 emissions to help the environment.
But cute characters also explain us more mundane matters. To make sure that people understand, a cute polar bear explains how to use the big printer/scanner we have at the office. Luckily for near-analphabets like us, a lot of instruction manuals for household appliances are very well illustrated. Who needs to read the text, if a cute rendition of the humidifier shows so well what it likes and what not!