Which passport do my children need to use to enter Canada?

Hello all,

Quick question. My two children are dual citizens, Japan and Canada, and we are planning a stay of 6 weeks between Canada and the US next spring.

For my wife, a Japanese citizen, she will need to get an eTA for both countries.

For me, Canadian citizen, I’ll need an eTA to enter the US.

For my children, is it okay to use their Japanese passports exclusively for the entire journey?
If using their Japanese passports, they would need eTAs for both countries, just like my wife.

Thank you for taking the time to answer my question.