Apex domains cannot have CNAME records.
Question and response
Question
dig fctv.ne.jp. NS
Answer
fctv.ne.jp. 5 NS ns001-njm571eus79hi5qm.n.d-53.info.
fctv.ne.jp. 5 NS ns001-njm571eus79hi5qm.n.d-53.net.
fctv.ne.jp. 5 NS ns001-njm571eus79hi5qm.n.d-53.jp.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0