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 (May 2019)

  ISP IPv6 tests count
1.Jpne4,668
2.Mf-native62,728
3.Ocn2,503
4.Bbix1,532
5.Biglobe1,340
6.Internet Multifeed Co.1,249
7.Asahi361
8.Choopa356
9.Kddi296
10.Japan Network Information Center269
11.Japan Network Information Center, Internet Initiative Japan Inc.255
12.Hurricane Electric LLC252
13.Softbank BB Corp.223
14.So-net Entertainment Corporation185
15.Jupiter Telecommunication Co. Ltd72
16.i3D.net B.V. Tokyo Japan61
17.K-opticom61
18.interQ61
19.InfoSphere52
20.NTTDoCoMo46
21.Zaq40
22.NTT Communications Corporation33
23.Cat Networks K.K.32
24.xTom Limited31
25.M247 Ltd30

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, May 2019)

  ISP Unique IPv6 addresses
1.Jpne2,729
2.Ocn1,527
3.Mf-native61,494
4.Bbix954
5.Biglobe808
6.Internet Multifeed Co.736
7.Asahi224
8.Japan Network Information Center181
9.Kddi179
10.Japan Network Information Center, Internet Initiative Japan Inc.166
11.So-net Entertainment Corporation121
12.Softbank BB Corp.111
13.Hurricane Electric LLC110
14.Choopa95
15.NTTDoCoMo37
16.InfoSphere35
17.K-opticom31
18.NTT Communications Corporation24
19.Jupiter Telecommunication Co. Ltd24
20.Cat Networks K.K.23
21.xTom Limited20
22.M247 Ltd19
23.Fcc17
24.interQ16
25.Linode13

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 (May 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Shanghai Huajuan Information Technology Co500.0%5100.0%
2.Zdm Network Solutions Llc900.0%9100.0%
3.Tokai1500.0%15100.0%
4.Home NOC Operators Group1100.0%11100.0%
5.ANEXIA Internetdienstleistungs GmbH900.0%9100.0%
6.i3D.net B.V. Tokyo Japan6111.6%6098.4%
7.Sakura1915.3%1894.7%
8.Amazon Technologies Inc1715.9%1694.1%
9.Fcc2229.1%2090.9%
10.Energia Communications8112.5%787.5%
11.Ocn2,50334113.6%2,16286.4%
12.Mf-native62,72839414.4%2,33485.6%
13.Asahi3615314.7%30885.3%
14.Jpne4,66870515.1%3,96384.9%
15.Kddi2964515.2%25184.8%
16.Kir26415.4%2284.6%
17.Biglobe1,34021516.0%1,12584.0%
18.interQ611016.4%5183.6%
19.China Mobile communications corporation6116.7%583.3%
20.CoreLink-E Tokyo Network6116.7%583.3%
21.Sinet11218.2%981.8%
22.Internet Multifeed Co.1,24923118.5%1,01881.5%
23.Bbix1,53234322.4%1,18977.6%
24.Chubu Telecommunications Company, Inc.13323.1%1076.9%
25.KDDI Corporation13323.1%1076.9%

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 (May 2019)

  ISP Test count IPv6 average
1.Jupiter Telecommunication Co. Ltd7285.4 Mbps
2.KDDI Corporation1360.9 Mbps
3.Hokuden Information System Service Co., Ltd.551.2 Mbps
4.Zaq4041.7 Mbps
5.Amazon Technologies Inc1738.9 Mbps
6.xTom Limited3135.9 Mbps
7.InfoSphere5235.1 Mbps
8.NTT Communications Corporation3328.2 Mbps
9.Japan Network Information Center26925.2 Mbps
10.NTTDoCoMo4623.8 Mbps
11.So-net Entertainment Corporation18522.7 Mbps
12.Asahi36121.3 Mbps
13.Jpne4,66820.4 Mbps
14.Ocn2,50319.7 Mbps
15.Biglobe1,34019.4 Mbps
16.K-opticom6119.3 Mbps
17.Mf-native62,72819.1 Mbps
18.Bbix1,53218.3 Mbps
19.Internet Multifeed Co.1,24917.3 Mbps
20.Fcc2215.9 Mbps
21.Linode2913.9 Mbps
22.Japan Network Information Center, Internet Initiative Japan Inc.25513.3 Mbps
23.Kddi29612.3 Mbps
24.Choopa, LLC229.1 Mbps
25.Choopa3567.8 Mbps