spf.rakus-cloud.jp has no CNAME records.
Question and response
Question
dig spf.rakus-cloud.jp. NS
Answer
The response has no answer records.
Authority
rakus-cloud.jp. 300 SOA ns-1166.awsdns-17.org. root.rakus-cloud.jp. 2025102200 3600 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0