Are there any conditions for purchasing a municipal bus / subway commuter pass?

You can purchase if the usage period of the municipal bus and the municipal subway (1 month, 3 months, 6 months) is the same.

In addition, you can purchase not only when connecting directly like "municipal bus → municipal subway", but also when you get on like "municipal bus → other railway company → municipal subway". (In this case, you will need to bring two regular periods: a "municipal bus / subway commuter pass" and a "other railway company". Please note that a 10% discount will not be applied if the commuter pass is set to one.)

Commuter pass for municipal buses and subways