Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain _e8cd2d32befb95d0dea0a9eae19a93a4.www.city.soja.okayama.jp is not the root of its zone.
Instead, try zone transfer on gtlqmkpmvp.acm-validations.aws .
Instead, try zone transfer on gtlqmkpmvp.acm-validations.aws .