Japan IPv6 in Japan

These graphs show the evolution of default protocol, v6 address types, and average bandwidth in Japan over time.

They are generated using the data collected by the ipv6-test.com connection test page, and are updated on a monthly basis.

Overall IPv6 and v4 protocol support in Japan

This graph shows the evolution of IPv6 support vs IPv4 for all our connection test.

The numbers are percentages, so we can expect almost 100% of hosts supporting IPv4 with a slow growth for IPv6.

Top 25 internet service providers for IPv6 in Japan (Mar 2019)

  ISP IPv6 tests count
1.Ocn3,551
2.Mf-transix-e2,767
3.Jpne-ip62,366
4.Bbix1,870
5.Jpne1,790
6.Biglobe1,469
7.Mf-transix-w1,357
8.Asahi505
9.Iij373
10.Japan Network Information Center348
11.SoftBank Corp.345
12.Kddi335
13.Choopa220
14.So-net Entertainment Corporation177
15.InfoSphere170
16.interQ-JPNIC105
17.Linode104
18.NTT Communications Corporation79
19.Hurricane Electric LLC69
20.M247 Ltd67
21.NTTDoCoMo66
22.Jtcl60
23.Hurricane Electric60
24.Choopa, LLC57
25.K-opticom49

IPv6 and v4 protocol support in Japan (unique addresses)

This graph shows the evolution of IPv6 support vs IPv4 for unique users of our connection test.

The numbers are percentages, so we can expect a slow growth towards 50% v4 / 50% v6.

Top 25 internet service providers for IPv6 in Japan (unique addresses, Mar 2019)

  ISP Unique IPv6 addresses
1.Ocn1,924
2.Jpne-ip61,494
3.Mf-transix-e1,423
4.Bbix1,185
5.Jpne993
6.Biglobe875
7.Mf-transix-w788
8.Asahi321
9.Iij251
10.Kddi231
11.Japan Network Information Center211
12.SoftBank Corp.184
13.So-net Entertainment Corporation124
14.Choopa107
15.InfoSphere57
16.Hurricane Electric LLC50
17.NTT Communications Corporation44
18.NTTDoCoMo43
19.Hurricane Electric43
20.K-opticom36
21.Linode34
22.Choopa, LLC34
23.Cat Networks K.K30
24.M247 Ltd29
25.interQ-JPNIC27

Default browser protocol in Japan

This graph shows the percentage of browsers that default to IPv6 vs. IPv4 when visiting the ipv6-test connection test.

Hopefully, in the not so distant future, the v6 part will grow taller than the v4 one.

Default browser protocol in Japan (dual-stack users)

This graph shows the percentage of browsers that default to IPv6 vs. IPv4 for users that have both v4 and v6 connectivity.

Usually a system will default to v6 when it's available, but in some cases with tunneled connections, v4 stays the default.

Top 25 internet service providers for IPv6 default in Japan (Mar 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.i3D.net B.V. Tokyo Japan1900.0%19100.0%
2.Multifeed1000.0%10100.0%
3.Energia Communications700.0%7100.0%
4.Hurricane Electric60610.0%5490.0%
5.Zaq32412.5%2887.5%
6.STNet8112.5%787.5%
7.Jpne-ip62,36637315.8%1,99384.2%
8.Bbix1,87030616.4%1,56483.6%
9.Mf-transix-e2,76746216.7%2,30583.3%
10.Biglobe1,46925217.2%1,21782.8%
11.Kddi3356017.9%27582.1%
12.Jpne1,79032518.2%1,46581.8%
13.Japan Network Information Center3486518.7%28381.3%
14.Mf-transix-w1,35725819.0%1,09981.0%
15.Commufa21419.0%1781.0%
16.InfoSphere1703319.4%13780.6%
17.Asahi5059919.6%40680.4%
18.interQ-JPNIC1052120.0%8480.0%
19.Internet Initiative Japan Inc.5120.0%480.0%
20.Ocn3,55172920.5%2,82279.5%
21.Research Organization of Information and Systems, National Institute of Informat14321.4%1178.6%
22.So-net Entertainment Corporation1773922.0%13878.0%
23.Sinet18422.2%1477.8%
24.NTT Communications Corporation792126.6%5873.4%
25.NTTDoCoMo661827.3%4872.7%

IPv6 address types in Japan

Here you can see the evolution of address types over time, and measure usage of 6to4 and Teredo tunneled connectivity.

It should be noted that because 6rd works with native addresses, it cannot be detected here as tunneled. This is also the case with VPN based tunnels.

Downstream bandwidth in Japan

This graph illustrates the connection speed gap between IPv4 and IPv6, numbers represent v6 speed as percentage of v4 speed.

The lower IPv6 speeds are often caused by tunneling overhead or insufficient v6 connectivity or peering capacity at ISPs.

Top 25 internet service providers for IPv6 speed in Japan (Mar 2019)

  ISP Test count IPv6 average
1.Zaq32135.4 Mbps
2.Jtcl60104.7 Mbps
3.InfoSphere17073.0 Mbps
4.NTTDoCoMo6667.5 Mbps
5.Sinet1847.9 Mbps
6.interQ-JPNIC10544.2 Mbps
7.Linode10433.8 Mbps
8.So-net Entertainment Corporation17729.2 Mbps
9.M247 Ltd6727.9 Mbps
10.STNet827.2 Mbps
11.K-opticom4925.4 Mbps
12.Tokai2223.9 Mbps
13.Iij37322.7 Mbps
14.Cat Networks K.K4819.5 Mbps
15.NTT Communications Corporation7919.1 Mbps
16.Kddi33518.8 Mbps
17.Sakura1017.8 Mbps
18.Mf-transix-e2,76713.7 Mbps
19.Ipr512.9 Mbps
20.Jpne-ip62,36612.7 Mbps
21.Asahi50512.7 Mbps
22.Ocn3,55112.5 Mbps
23.Mf-transix-w1,35712.5 Mbps
24.Biglobe1,46912.3 Mbps
25.Japan Network Information Center34812.0 Mbps