J:COM Speed Test

J:COM is an internet service provider which operates in Japan. Currently it ranks on the place 8 from 451 providers in Japan.

Average results for J:COM

297.72 Mb/s

Download Speed

35.63 Mb/s

Upload Speed

53 ms

Ping Latency

J:COM coverage

You can get Internet access in Tokyo, Kumamoto, Osaka, Fukuoka, Sendai, Sapporo, and other cities within Japan.

Most popular ISPs in Japan

Provider Name	Download Speed	Number of Tests
NTT	278.38 Mb/s	451206
Softbank BB	144.85 Mb/s	166192
au one net	191.83 Mb/s	143321
KDDI	426.94 Mb/s	70344
So-net	364.66 Mb/s	68401
Biglobe	257.16 Mb/s	57653
Ntt Docomo	169.94 Mb/s	57141
K-Opticom Corporation	137.63 Mb/s	42829
JPNE	357.86 Mb/s	33306
Rakuten Mobile Network	79.33 Mb/s	31728

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 03.10.2023 to 03.04.2024).