Earlier quoted context omitted.
For me it was the hot milk tea. Almost impossible to find in the West, every morning at near freezing temps I could cling to a metal piping hot can of sweet milk tea. I can't go a day in .jp without grabbing a can. What really surprised me is how in a place like Tokyo the machines seemed to only reliably function using change, whereas in Norway you pay for bus station lockers and public toilets with credit cards.
"Royal Milk Tea" is easy to make (although it's hard to clean the pan afterwards). Boil a cupful of milk with a teabag in it. Once it's boiled, take out the teabag and add sugar. In fact I think I might have one right now ...
1. Make a syrup out of brown sugar by heating it in a pan with some water. The real recipe uses palm sugar but brown sugar is close enough.
2. Put it in a cup, then evaporated milk, then strong black tea.
3. Mix to taste. The three layers don’t mix together on their own. The more you mix it the sweeter the drink gets.