Also, the Moonie nappy brand is pretty good. Nappies are sold in pharmacies rather than supermarkets. Baby food can be hard to find, and your best bet is a Toys R Us or giant department store.
We used a backpack carrier at 7mths, which was great as you could take it off and stand it up with DD still asleep in it - handy for restaurants.
Most cafes are happy to heat bottles, but you may need to explain how as a few frothed them like milk for a cappuccino!
There are baby change facilities everywhere.
Expect lots of attention as people there love babies and small children. You will hear lots of "kawaii" (cute).
Look for a Citadines apartment (or similar) as most hotel rooms are tiny. There's a good one in Shinjuku (if you're staying in Tokyo) which is walking distance from the underground station.
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