Japan has some of the fastest and cheapest broadband internet in the world. Getting set up takes a few weeks but once connected, speeds of 1Gbps for ¥4,000–5,000/month are standard.
Your Main Options
| Type | Speed | Price | Setup Time | Best For |
|---|---|---|---|---|
| Fiber optic (光回線) | Up to 10Gbps | ¥4,000–6,000/month | 2–4 weeks | Long-term residents |
| Home WiFi router (au/docomo) | 100–300 Mbps | ¥3,000–5,000/month | Same day | Short-term or can’t get fiber |
| Pocket WiFi | 30–150 Mbps | ¥2,000–4,000/month | Next day | Temporary or mobile use |
Fiber Optic (光回線) — Best Value for Long-Term Residents
NTT Flet’s Hikari + ISP
Japan’s fiber runs primarily through NTT’s Flet’s Hikari network. You pair this with an ISP (internet service provider):
Best ISPs:
- So-net (ソネット) — reliable, English support available
- Nuro Hikari — often fastest speeds, good pricing (¥2,090/month + NTT line fee)
- au Hikari — good for au mobile users (bundle discounts)
- SoftBank Hikari — good for SoftBank mobile users
Total monthly cost: ¥4,500–6,000 (NTT line fee + ISP fee)
Setup process:
- Apply online through your chosen ISP
- NTT schedules a technician to install the fiber line at your apartment
- Technician visit required — coordinate a day when you can be home
- Your landlord must permit fiber installation (most modern apartments allow it)
For Foreigners: Key Considerations
- Contract length: Most fiber plans have 2-year contracts with cancellation fees (¥10,000–30,000)
- Language: Setup process is mostly Japanese — some ISPs have English support
- Router: Usually provided by the ISP or can be purchased separately
Home WiFi Router (ホームルーター)
A plug-in 4G/5G router — no technician needed, works immediately.
Best options:
- au Home Router — ¥3,000–4,000/month, stable speeds
- docomo home WiFi — similar pricing
- SoftBank Airterm — ¥3,000–5,000/month
Advantages:
- No installation appointment needed
- Works in apartments where fiber isn’t available
- No landlord permission needed
Disadvantage: Speeds less consistent than fiber; may throttle during peak hours
Pocket WiFi (ポケットWiFi)
Portable battery-powered WiFi router. Good for temporary situations.
Short-term rental services (for tourists/new arrivals):
- Ninja WiFi, Sakura Mobile WiFi — English-friendly, rent from ¥300/day
- Available at airports on arrival
Monthly contract options:
- IIJmio, UQ WiMAX — ¥2,000–3,500/month
👉 Full guide: Pocket WiFi and Mobile Internet in Japan
English-Friendly Setup: Easiest Options
If you want the least hassle with language:
- Sakura Fiber / Mobal Japan Internet — English customer service, foreigner-oriented
- GTN (Global Trust Networks) — English support, accepts foreign residents with shorter history
- Home WiFi routers — minimal Japanese required, just plug in and connect
Speed Test Benchmarks (Japan 2025 Average)
- Fiber optic: 300–900 Mbps download in practice (advertised up to 10Gbps)
- Home WiFi router: 50–200 Mbps depending on location and time
- Pocket WiFi (5G): 100–300 Mbps in 5G areas
For streaming, video calls, and working from home, even 50 Mbps is sufficient. Japan’s actual speeds almost always exceed what’s needed.