Mountain town in Wakayama, Japan
Internet in Koyasan: speed, SIM cards and coworking
Is the internet good in Koyasan?
Median fixed broadband in Japan is 234 Mbps and mobile is 66 Mbps (Speedtest Global Index, 2026-08). Few cafés have wifi; mobile signal is usable in the center. Bring a SIM or eSIM.
Getting online in Koyasan
| Details | |
|---|---|
| Home fibre | No long-term rentals; some temples offer wifi, often only in common areas. |
| Cafés and coworking | Few cafés have wifi; mobile signal is usable in the center. Bring a SIM or eSIM. |
| Tourist SIM | Data-only SIMs and eSIMs sold at airports and Bic Camera or Yodobashi, about ¥2,000–6,000; voice numbers need a residence card. |
| eSIM | Local carriers sell eSIMs to visitors. |
| Carriers | docomo, au, SoftBank, Rakuten Mobile |
| Monthly data plan | ¥2,000–4,000 ($13–25) |
Coworking in Koyasan
There's no dedicated coworking scene here; people work from cafés and accommodation.
Internet speeds in East Asia
National medians, Speedtest Global Index.
| Country | Fixed | Mobile |
|---|---|---|
| Hong Kong | 362 Mbps | 89 Mbps |
| Macau | 322 Mbps | — |
| Taiwan | 298 Mbps | 111 Mbps |
| South Korea | 251 Mbps | 251 Mbps |
| China | 238 Mbps | 176 Mbps |
| Japan | 234 Mbps | 66 Mbps |
| Mongolia | 86 Mbps | — |
Quick answers
Is the internet fast in Koyasan?
Median fixed broadband in Japan is 234 Mbps and mobile is 66 Mbps (Speedtest Global Index, 2026-08). Few cafés have wifi; mobile signal is usable in the center. Bring a SIM or eSIM.
Which SIM card should I get in Koyasan?
Data-only SIMs and eSIMs sold at airports and Bic Camera or Yodobashi, about ¥2,000–6,000; voice numbers need a residence card.
Can I use an eSIM in Japan?
Yes. Local carriers sell eSIMs to visitors, and travel eSIMs work too.
More about Koyasan
Going to Koyasan solo?
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Sources
- Speedtest Global Index: Japan
- docomo
- au
- SoftBank
- Rakuten Mobile
- Koyasan Shukubo Association
- Koyasan Tourist Association
- Nankai Electric Railway
Speeds are medians from Ookla's Speedtest Global Index, cited for reference. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.