What is a domain, exactly?
On the internet, every computer is assigned a numeric address called an IP address (e.g., 192.168.1.1). But numbers alone are hard for people to remember, so domains were created as human-readable names.
For example, the domain "google.com" is internally translated to an IP address like "142.250.196.110" when you access it. A domain is like a phone book and street address combined for the internet.
How to register a domain
Domains can be registered through services like Onamae.com, MuuMuu Domain, Cloudflare Registrar, and Squarespace Domains. Search for the name you want, and if it shows "available," you can proceed to purchase. Each service differs in renewal fees, payment options, Japanese-language support, and privacy handling — so don't choose based on price alone.
Common domain extensions
Recommended approach for teens
If it's your first domain, choose a service that has clear Japanese-language documentation and lets you easily check renewal fees and support options. If you're comfortable with English interfaces, international registrars are fine too. Just don't choose based on price alone — you might run into higher renewal fees or a confusing dashboard later.
Pick a name that is short, memorable, and readable even in romanized form. Something like "yourname.dev" or "nickname.me" works well as a personal brand and can be used across your portfolio and social media profiles. Avoid using your school name, home address, or full legal name — check with a parent or guardian whether the chosen name is safe to publish publicly.
What to do after registration
Just buying a domain doesn't make your site visible. Next you need to connect the domain to a server via DNS settings. If you're using GitHub Pages or shared hosting, follow the provider's instructions to set an "A record" or "CNAME." Changes take some time to propagate, so don't panic if the site doesn't appear immediately. Before making any changes, take a screenshot of your current DNS settings so you can revert easily if needed.
Watch out for these pitfalls
- Many registrars require minors to have a parent or guardian as the registered account holder. You'll need to provide a real name and address, so discuss it beforehand.
- "First year ¥100" promotions can jump to much higher renewal rates in year two. Always check the renewal price upfront.
- Domains that overlap with trademarks (Pokémon, Disney, etc.) can be purchased but carry legal risk. Avoid well-known brand names.
How does this help your future?
Your own domain becomes the foundation for a portfolio site or custom email address (e.g., me@yourname.dev). Instead of just posting work on GitHub or social media, you can consolidate everything at your own URL — much easier to explain during university applications, job hunting, or presentations. Managing a contract and renewals is also good practice for understanding web operations.
Things you can try today
- Write down 3 domain name candidates — short, memorable, and readable.
- Search for availability on Onamae.com or Cloudflare Registrar.
- Talk with a parent or guardian, confirm the first-year and renewal price, then register one.