Soldato
Kitkat sounds like short for Kitto Katsu which in Japanese means "you will surely win". So Kitkat has become this thing you gift to children before an exam or a sports day race to wish them good luck. Each bar has a little white space at the back where you can write a personal message.
Also, the Japanese are very open to new flavours, a lot of these flavours are seasonal and limited, they come and they go, don't get attached to a flavour when you are there, it will likely be gone in a few weeks. It's just something they do.
They could make the same kind of KitKat here in the west, but they would bomb, they make orange flavour, caramel flavour and honestly, it's the kind of flavours you find in other chocolates on the shelf. It's not a NEW flavour not found elsewhere in the sweets aisle. It would be the day when they bring out Purple Sweet Potatoe Kitkat or Yuzu Sake (the yellow box). The difference in mindset is that, and massively stereotyping, most people here see "Sweet Potatoe in a chocolate bar?" their first reaction is "Ewwwwwww", as opposed to "Oooooooooooooh".
Visiting Japan is on my list when little one is older. Her mum and her have no interest, mainly for the flight time but one day, I'm going to visit solo and eat all the KitKats.