J:COM Speed Test

J:COM is an internet service provider which operates in Japan. Currently it ranks on the place 9 from 407 providers in Japan.

Average results for J:COM

268.17 Mb/s

Download Speed

53.17 Mb/s

Upload Speed

61 ms

Ping Latency

J:COM coverage

You can get Internet access in and other cities within Japan.

Most popular ISPs in Japan

Provider Name	Download Speed	Number of Tests
NTT	447.48 Mb/s	396555
Softbank BB	249.2 Mb/s	110315
au one net	262.49 Mb/s	96033
KDDI	351.32 Mb/s	48507
Biglobe	346.91 Mb/s	38619
Ntt Docomo	121.69 Mb/s	34974
So-net	439.88 Mb/s	33561
Rakuten Mobile Network	58.1 Mb/s	30336
JPNE	378.22 Mb/s	25393
K-Opticom Corporation	318.54 Mb/s	25229

Looking for more detailed information? Check our crowdsourced data

The download, upload and ping test will be performed to the closest server available near your location. This will mean that test will also be influenced by other factors such as quality of interconnection of J:COM with Internet backbone. This test is more relevant to assess real Internet connection quality than ISP sponsored test since those typically test against a server within the ISP and do not test real Internet speed.

Results based on tests in last 6 months (from 03.07.2024 to 03.01.2025).