MuuMuu Domain is a domain registrar from GMO Pepabo, aimed at individuals and small businesses looking for affordable domain registration in Japan. It carries one of the broadest selections of domain types available from a Japanese registrar, with hundreds of TLDs.

The service ties in closely with other GMO Pepabo products like Lolipop! hosting, heteml servers, and Color Me Shop for online stores. Pairing a domain with MuuMuu Server keeps registration and renewal free for the life of the server contract. A marketplace for buying previously owned .jp domains through auctions and backorders is also available, and privacy protection for domain ownership records is supported for both global and JP domains.

MuuMuu DNS supports ALIAS records, letting users point a root domain (like example.com) directly to cloud services and CDNs. This removes a common technical limitation that normally requires workarounds when connecting a bare domain to these platforms.

MuuMuu Mail lets users create email addresses on their own domain. It includes webmail access, spam filtering, and works with standard desktop and mobile email apps.