If you are planning to travel to a city in Asia with an infant, I recommend you visit Seoul, Korea. The reason why I recommend you visit Seoul is that there are many baby lounges in the city.
The baby lounges in Seoul are very clean and there are useful facilities in the lounges. Compare to baby lounges in Japan, those in Korea are much better.
Visit department stores when you need to change an infant’s diaper or feed him or her milk. In Seoul, Lotte Department Store, Shinsegae Department Store and COEX Mall have useful baby lounges. Any lounges are managed by janitors. I have visited those stores then I think Lotte Department Store in Myeongdong has the best baby lounge.
The baby lounge of Lotte Department Store in Myoengdong is located on the 8th floor. There are some sofas so you can take a rest with your baby there.
You can use tables and chairs for meal. Also, there are a water server and a boiled water server so you can easily make milk. Those servers are advanced because you can adjust temperature and quantity of water. The servers can serve you boiled water you need automatically.
The lounge has a sink, detergent and brushes. You can wash used bottles and dishes.
People in Seoul are very kind to children and there are some baby lounges having good facilities. Seoul is a good city to visit with an infant.