Apex domains cannot have CNAME records.
Question and response
Question
dig callcall.jp. NS
Answer
callcall.jp. 4 NS ns-rs2.gmoserver.jp.
callcall.jp. 4 NS ns-rs1.gmoserver.jp.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0