Apex domains cannot have CNAME records.
Question and response
Question
dig nakamurahamono.com. NS
Answer
nakamurahamono.com. 5 NS ns-952.awsdns-55.net.
nakamurahamono.com. 5 NS ns-1875.awsdns-42.co.uk.
nakamurahamono.com. 5 NS ns-278.awsdns-34.com.
nakamurahamono.com. 5 NS ns-1198.awsdns-21.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0