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 (Apr 2019)

  ISP IPv6 tests count
1.Jpne2,389
2.Ocn2,336
3.Jpne-ip62,021
4.Bbix1,637
5.Mf-transix-e1,573
6.Biglobe1,292
7.Mf-transix-w812
8.Mf-native6759
9.Asahi438
10.Internet Multifeed Co.375
11.Japan Network Information Center337
12.Kddi306
13.SoftBank Corp.232
14.So-net Entertainment Corporation223
15.Iij218
16.Choopa161
17.Hurricane Electric LLC115
18.InfoSphere104
19.NTT Communications Corporation83
20.Zaq67
21.Linode67
22.Softbank BB Corp.61
23.M247 Ltd52
24.NTTDoCoMo51
25.K-opticom47

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, Apr 2019)

  ISP Unique IPv6 addresses
1.Ocn1,417
2.Jpne1,397
3.Jpne-ip61,244
4.Bbix1,007
5.Mf-transix-e937
6.Biglobe778
7.Mf-transix-w481
8.Mf-native6400
9.Asahi239
10.Internet Multifeed Co.222
11.Kddi221
12.Japan Network Information Center181
13.So-net Entertainment Corporation131
14.Iij121
15.SoftBank Corp.115
16.Hurricane Electric LLC77
17.InfoSphere57
18.Choopa57
19.NTT Communications Corporation49
20.Softbank BB Corp.40
21.K-opticom37
22.Japan Network Information Center, Internet Initiative Japan Inc.36
23.NTTDoCoMo31
24.M247 Ltd27
25.Hurricane Electric21

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 (Apr 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.i3D.net B.V. Tokyo Japan2100.0%21100.0%
2.ANEXIA Internetdienstleistungs GmbH600.0%6100.0%
3.Hurricane Electric3000.0%30100.0%
4.Energia Communications2200.0%22100.0%
5.Ipr1317.7%1292.3%
6.Mf-native67599312.3%66687.7%
7.Community Network Center Inc.8112.5%787.5%
8.Japan Network Information Center3374613.6%29186.4%
9.Jpne2,38935614.9%2,03385.1%
10.Kddi3064615.0%26085.0%
11.Mf-transix-e1,57324015.3%1,33384.7%
12.Sannet39615.4%3384.6%
13.Biglobe1,29220315.7%1,08984.3%
14.Mf-transix-w81212815.8%68484.2%
15.Jpne-ip62,02132716.2%1,69483.8%
16.Bbix1,63732219.7%1,31580.3%
17.Ocn2,33646419.9%1,87280.1%
18.Asahi4389321.2%34578.8%
19.NTT Communications Corporation831821.7%6578.3%
20.SoftBank Corp.2325322.8%17977.2%
21.Softbank BB Corp.611423.0%4777.0%
22.China Mobile communications corporation13323.1%1076.9%
23.K-opticom471123.4%3676.6%
24.Iij2185525.2%16374.8%
25.Internet Multifeed Co.3759625.6%27974.4%

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 (Apr 2019)

  ISP Test count IPv6 average
1.Jupiter Telecommunication Co. Ltd6103.0 Mbps
2.Zaq6755.3 Mbps
3.InfoSphere10453.9 Mbps
4.Jtcl2151.0 Mbps
5.interQ-JPNIC3043.3 Mbps
6.Techorus639.8 Mbps
7.Energia Communications2232.4 Mbps
8.Tokai1430.2 Mbps
9.So-net Entertainment Corporation22325.1 Mbps
10.NTT Communications Corporation8324.4 Mbps
11.Chubu Telecommunications Company, Inc.523.4 Mbps
12.Ocn2,33623.2 Mbps
13.K-opticom4722.4 Mbps
14.Internet Multifeed Co.37521.6 Mbps
15.Japan Network Information Center33720.1 Mbps
16.Kddi30619.8 Mbps
17.Biglobe1,29219.6 Mbps
18.Mf-native675918.9 Mbps
19.Sannet3918.9 Mbps
20.Asahi43818.7 Mbps
21.Jpne-ip62,02118.6 Mbps
22.Jpne2,38918.3 Mbps
23.Mf-transix-w81216.0 Mbps
24.Mf-transix-e1,57315.5 Mbps
25.Bbix1,63715.2 Mbps