Kumamoto City is twinned with the following cities.

Tokyo is twinned with the following cities and states:

Munich is twinned with the following cities (date of agreement shown in parentheses).

Kawasaki is twinned with the following cities in Japan and worldwide.

San Cristóbal is twinned with the following cities and municipalities:

Kagoshima is twinned with the following four cities overseas.

Hikone is twinned with the following two cities.

Osaka is twinned with the following cities around the world.

Rasht has signed the treaty of city twinning with the following cities:

It is also twinned with the following cities in Japan.