Apex domains cannot have CNAME records.
Question and response
Question
dig kanagawa-lasik.net. NS
Answer
kanagawa-lasik.net. 5 NS ns-127.awsdns-15.com.
kanagawa-lasik.net. 5 NS ns-216.awsdns-27.com.
kanagawa-lasik.net. 5 NS ns-163.awsdns-20.com.
kanagawa-lasik.net. 5 NS ns-726.awsdns-26.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0