I brought my 12month old to Japan they are actually very child friendly. Depends on the hotel you are staying in, they have plain porridge in the morning. You can add abit of egg or salmon too. Many malls have clean baby changing rooms and vending machines or stores carrying pouch food. Japan is a good place to bring babies or toddlers in my opinion. have a great one!
I brought my 18 month old to Japan. It was not a great experience. Most restaurants didn’t accept a baby! We went to Tokyo and Osaka