Apex domains cannot have CNAME records.
Question and response
Question
dig infopanel.jp. NS
Answer
infopanel.jp. 5 NS ns-1560.awsdns-03.co.uk.
infopanel.jp. 5 NS ns-1131.awsdns-13.org.
infopanel.jp. 5 NS ns-158.awsdns-19.com.
infopanel.jp. 5 NS ns-858.awsdns-43.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0