Japan Speed Test - Check Your Internet Speed | 2026
Test your internet speed in Japan
Test your internet speed in Japan and compare your results with national averages. This free tool measures download, upload, and latency for fiber, cable, and mobile connections. Japan has 93% internet penetration with one of the highest fiber-to-the-home (FTTH) adoption rates globally. NTT leads the fixed broadband market while NTT DoCoMo, au (KDDI), and SoftBank compete for mobile subscribers.
Internet in Japan
Japan pioneered consumer fiber internet with NTT's FLET'S Hikari service launching in 2001. Today, over 80% of fixed connections are fiber, delivering average speeds of 180 Mbps download. The market is divided between NTT East and NTT West for fixed broadband, while NTT DoCoMo, au (KDDI), and SoftBank dominate mobile.
5G deployment began in 2020, with standalone 5G now available in major cities. Rakuten Mobile entered as the fourth carrier, disrupting pricing with aggressive unlimited plans. Average mobile speeds reach 85 Mbps, among the fastest globally. Gigabit fiber is widely available at competitive prices, typically 4,000-5,000 yen per month.
How to Choose an ISP in Japan
Several factors determine the best provider at your address in Japan. Check coverage, compare pricing, and test speeds before signing a contract.
Decide between NTT FLET'S Hikari and alternative fiber
NTT East (eastern Japan) and NTT West (western Japan) operate the FLET'S Hikari network that most ISPs resell. You pick an ISP (provider) separately from the line. Popular ISPs on the NTT network include OCN, So-net, BIGLOBE, and @nifty. Each sets its own monthly fee on top of the NTT line charge.
Check NURO Hikari and au Hikari availability
NURO Hikari (Sony) uses its own fiber network and offers 2 Gbps plans starting around 5,200 yen/month. au Hikari (KDDI) runs a separate network in most regions except the Kansai and Chubu areas served by eo Hikari and Commufa. These alternatives often deliver faster speeds than NTT-based services in the same building.
Consider SoftBank Hikari if you have a SoftBank or Y!mobile phone
SoftBank bundles fixed internet with mobile plans for a combined discount of 550-1,100 yen per line per month. au Hikari offers similar discounts for au and UQ Mobile users. NTT-based ISPs pair with DoCoMo for DoCoMo Hikari discounts. Matching your mobile carrier to your fiber provider saves 6,600-13,200 yen per year.
Check your building type
Apartments (mansion type) share a single fiber line among units, reducing speeds during peak hours. Detached houses (family type) get a dedicated line. NURO Hikari mansion plans are only available in buildings with 7+ units enrolled. Ask your building manager which fiber services are connected.
For budget users, NTT FLET'S Hikari with a discount ISP costs about 4,000-5,000 yen/month for gigabit service. NURO Hikari at 5,200 yen/month offers higher speeds but limited coverage. For rural areas, NTT FLET'S Hikari has the widest reach across Japan. If fiber is unavailable, SoftBank Air or WiMAX provide wireless home internet at 4,000-5,000 yen/month with 30-100 Mbps speeds.
Compare Internet Providers in Japan
The table below shows top providers by connection type and maximum advertised speed.
| Provider | Type | Max Speed |
|---|---|---|
| NTT East | fiber | 25000 Mbps |
| au by KDDI | fiber | 10000 Mbps |
| SoftBank | fiber | 10000 Mbps |
| NTT West | fiber | 10000 Mbps |
| NTT DoCoMo | fiber | 4200 Mbps |
Test Your Connection Speed
Run a speed test to verify your Japan provider delivers advertised speeds. Test during peak evening hours for the most accurate results.
Internet Providers in Japan
Compare internet speeds across major providers in Japan. Click on a provider to test your connection.
Japan Speed Test FAQ
What is the average internet speed in Japan?
Japan averages 180 Mbps download and 95 Mbps upload nationally. Fiber-to-the-home (FTTH) connections dominate, with many users accessing gigabit speeds through NTT's FLET'S Hikari or NURO Hikari services.
Which ISP has the fastest internet in Japan?
NURO Hikari (Sony Network Communications) offers some of the fastest consumer speeds at up to 10 Gbps. NTT's FLET'S Hikari and au Hikari also provide reliable gigabit connections. Mobile 5G speeds from DoCoMo, au, and SoftBank typically reach 200-400 Mbps.
How much does internet cost in Japan?
Fiber internet in Japan costs approximately 4,000-5,000 yen (around $30-35 USD) per month for gigabit service. Mobile plans range from 1,000-8,000 yen depending on carrier and data allowance. Rakuten Mobile offers competitive unlimited plans.