Apex domains cannot have CNAME records.
Question and response
Question
dig aries.oneoffice.jp. NS
Answer
aries.oneoffice.jp. 4 NS ns005-3s6no8sha95sor24.3.d-53.info.
aries.oneoffice.jp. 4 NS ns005-3s6no8sha95sor24.3.d-53.jp.
aries.oneoffice.jp. 4 NS ns005-3s6no8sha95sor24.3.d-53.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0