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 (Jan 2019)

  ISP IPv6 tests count
1.Jpne-ip63,053
2.Mf-transix-e2,368
3.Bbix2,056
4.Jpne1,655
5.Ocn1,605
6.Biglobe1,530
7.Mf-transix-w1,238
8.Asahi591
9.Japan Network Information Center453
10.Kddi441
11.SoftBank Corp.246
12.So-net Entertainment Corporation216
13.Iij212
14.InfoSphere211
15.Choopa184
16.Hurricane Electric LLC128
17.K-opticom128
18.NTT Communications Corporation103
19.i3D.net B.V. Tokyo Japan81
20.Linode72
21.interQ-JPNIC69
22.Jtcl58
23.Hurricane Electric51
24.M247 Ltd45
25.ANEXIA Internetdienstleistungs GmbH41

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, Jan 2019)

  ISP Unique IPv6 addresses
1.Jpne-ip61,702
2.Bbix1,342
3.Mf-transix-e1,317
4.Jpne1,090
5.Ocn1,047
6.Biglobe952
7.Mf-transix-w772
8.Asahi362
9.Kddi249
10.Japan Network Information Center242
11.SoftBank Corp.173
12.Iij158
13.So-net Entertainment Corporation135
14.InfoSphere102
15.Choopa81
16.K-opticom77
17.Hurricane Electric LLC70
18.NTT Communications Corporation53
19.Linode43
20.Hurricane Electric31
21.interQ-JPNIC27
22.Cat Networks K.K25
23.Commufa22
24.CT Networks20
25.M247 Ltd20

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 (Jan 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.i3D.net B.V. Tokyo Japan8100.0%81100.0%
2.Zaq1600.0%16100.0%
3.ANEXIA Internetdienstleistungs GmbH4100.0%41100.0%
4.Hurricane Electric5123.9%4996.1%
5.Cngi-cernet21317.7%1292.3%
6.Tokai27311.1%2488.9%
7.Tdnc8112.5%787.5%
8.Jpne1,65524414.7%1,41185.3%
9.Jpne-ip63,05346715.3%2,58684.7%
10.K-opticom1282116.4%10783.6%
11.Internet Initiative Japan Inc.6116.7%583.3%
12.Kddi4417517.0%36683.0%
13.Mf-transix-w1,23821717.5%1,02182.5%
14.Bbix2,05636217.6%1,69482.4%
15.Mf-transix-e2,36842317.9%1,94582.1%
16.Asahi59111820.0%47380.0%
17.STNet5120.0%480.0%
18.So-net Entertainment Corporation2164420.4%17279.6%
19.NTT Communications Corporation1032322.3%8077.7%
20.Commufa31722.6%2477.4%
21.Biglobe1,53035423.1%1,17676.9%
22.Japan Network Information Center45310723.6%34676.4%
23.Ocn1,60539624.7%1,20975.3%
24.NTTDoCoMo24625.0%1875.0%
25.InfoSphere2115727.0%15473.0%

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 (Jan 2019)

  ISP Test count IPv6 average
1.Zaq16184.9 Mbps
2.Jtcl58107.2 Mbps
3.InfoSphere21170.7 Mbps
4.Kir1338.6 Mbps
5.So-net Entertainment Corporation21634.8 Mbps
6.Bit-drive631.3 Mbps
7.K-opticom12830.9 Mbps
8.Amazon Technologies Inc1520.5 Mbps
9.NTT Communications Corporation10318.1 Mbps
10.Kddi44116.8 Mbps
11.interQ-JPNIC6916.6 Mbps
12.Japan Network Information Center45314.9 Mbps
13.Asahi59113.7 Mbps
14.Jpne-ip63,05313.7 Mbps
15.Ocn1,60513.2 Mbps
16.Mf-transix-e2,36812.5 Mbps
17.Iij21211.9 Mbps
18.Mf-transix-w1,23811.8 Mbps
19.Bbix2,05611.7 Mbps
20.Jpne1,65511.6 Mbps
21.Energia Communications510.8 Mbps
22.Choopa18410.3 Mbps
23.Community Network Center Inc.79.8 Mbps
24.Choopa, LLC269.1 Mbps
25.Biglobe1,5308.8 Mbps