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 2017)

  ISP IPv6 tests count
1.Jpne3,490
2.Bbix3,274
3.Ocn2,079
4.Sbb1,565
5.Japan Network Information Center1,357
6.Mf-native61,169
7.Kddi949
8.Hurricane Electric758
9.Mf-native6-w571
10.Choopa530
11.K-opticom369
12.Iij306
13.Hinet194
14.Cernet191
15.InfoSphere149
16.Jtcl122
17.Iijnet120
18.interQ102
19.Jpnic100
20.Bbtec91
21.Sakura83
22.Tokai70
23.Zaq54
24.Linode50
25.Biglobe46

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 2017)

  ISP Unique IPv6 addresses
1.Jpne2,156
2.Bbix1,981
3.Sbb1,137
4.Ocn1,134
5.Japan Network Information Center832
6.Mf-native6671
7.Kddi654
8.Mf-native6-w384
9.Hurricane Electric381
10.Iij211
11.Choopa141
12.Iijnet96
13.InfoSphere88
14.Jtcl59
15.Bbtec56
16.K-opticom52
17.interQ45
18.Sakura42
19.Tokai42
20.Jpnic38
21.Biglobe36
22.Commufa28
23.Linode26
24.Idc2-network19
25.University of Tsukuba, Sangaku Renkei Kenkyukai19

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 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Ssd1700.0%17100.0%
2.Jpix600.0%6100.0%
3.NTTDoCoMo1100.0%11100.0%
4.Comcast Cable Communications500.0%5100.0%
5.Keio500.0%5100.0%
6.STNet1715.9%1694.1%
7.Jpnic10066.0%9494.0%
8.Cttnet4648.7%4291.3%
9.Bit-drive1119.1%1090.9%
10.WIDE Project9111.1%888.9%
11.Ultina8112.5%787.5%
12.Hinet1942512.9%16987.1%
13.Kddi94912913.6%82086.4%
14.Ipr14214.3%1285.7%
15.Mf-native6-w5719015.8%48184.2%
16.Jpne3,49055515.9%2,93584.1%
17.Bbix3,27453816.4%2,73683.6%
18.Commufa46817.4%3882.6%
19.Iij3065618.3%25081.7%
20.Apnic Portables821419.0%1781.0%
21.Iijnet1202319.2%9780.8%
22.Hicat10220.0%880.0%
23.Mf-native61,16924220.7%92779.3%
24.Sbb1,56535922.9%1,20677.1%
25.Zaq541527.8%3972.2%

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 2017)

  ISP Test count IPv6 average
1.Cwidc2250.4 Mbps
2.Mf-native61,16940.8 Mbps
3.STNet1739.6 Mbps
4.Japan Network Information Center1,35738.0 Mbps
5.InfoSphere14931.5 Mbps
6.Jpne3,49031.0 Mbps
7.Ocn2,07930.5 Mbps
8.Mf-native6-w57129.7 Mbps
9.Tokai7028.6 Mbps
10.Sakura8328.5 Mbps
11.Sannet926.9 Mbps
12.Commufa4624.5 Mbps
13.Hicat1024.4 Mbps
14.Kddi94922.7 Mbps
15.Bbix3,27421.1 Mbps
16.Jtcl12216.0 Mbps
17.Iijnet12012.9 Mbps
18.Iij30612.6 Mbps
19.Jpix612.3 Mbps
20.Asahi1710.8 Mbps
21.So-net Corporation810.6 Mbps
22.Jpnic1009.4 Mbps
23.Zaq549.3 Mbps
24.interQ1029.1 Mbps
25.K-opticom3698.2 Mbps