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 (Feb 2017)

  ISP IPv6 tests count
1.Jpne3,994
2.Bbix3,383
3.Ocn2,250
4.Sbb1,551
5.Japan Network Information Center1,410
6.Mf-native61,273
7.Kddi969
8.Hurricane Electric723
9.Mf-native6-w706
10.Choopa457
11.Iij328
12.K-opticom206
13.InfoSphere195
14.interQ174
15.Hinet166
16.Iijnet146
17.Jtcl130
18.Linode121
19.Sakura93
20.Bbtec80
21.Tokai71
22.Cernet51
23.University of Tsukuba, Sangaku Renkei Kenkyukai46
24.Fruits-netv635
25.Commufa33

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, Feb 2017)

  ISP Unique IPv6 addresses
1.Jpne2,458
2.Bbix1,988
3.Ocn1,202
4.Sbb1,098
5.Japan Network Information Center910
6.Mf-native6734
7.Kddi684
8.Mf-native6-w468
9.Hurricane Electric384
10.Iij221
11.Choopa147
12.InfoSphere118
13.Iijnet112
14.K-opticom52
15.Bbtec49
16.Jtcl48
17.Tokai44
18.interQ43
19.Sakura37
20.Linode37
21.University of Tsukuba, Sangaku Renkei Kenkyukai29
22.Commufa24
23.Biglobe22
24.NTTDoCoMo18
25.Fruits-netv616

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 (Feb 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Rogers Communications Canada Inc.600.0%6100.0%
2.Ssd2500.0%25100.0%
3.Jpix600.0%6100.0%
4.NTTDoCoMo2100.0%21100.0%
5.STNet1218.3%1191.7%
6.Fruits-netv63538.6%3291.4%
7.Cttnet30310.0%2790.0%
8.Apnic Portables818211.1%1688.9%
9.Iijnet1461913.0%12787.0%
10.Kddi96913213.6%83786.4%
11.Hinet1662515.1%14184.9%
12.Mf-native6-w70611716.6%58983.4%
13.Bbix3,38358417.3%2,79982.7%
14.Jpne3,99469317.4%3,30182.6%
15.Iij3286419.5%26480.5%
16.Mf-native61,27325119.7%1,02280.3%
17.Bit-drive5120.0%480.0%
18.Hicat10220.0%880.0%
19.Commufa33721.2%2678.8%
20.Ipr12325.0%975.0%
21.Mediacat8225.0%675.0%
22.Sbb1,55142627.5%1,12572.5%
23.K-opticom2065928.6%14771.4%
24.Jtcl1303829.2%9270.8%
25.Hurricane Electric72323933.1%48466.9%

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 (Feb 2017)

  ISP Test count IPv6 average
1.Cwidc2550.4 Mbps
2.Jtcl13047.3 Mbps
3.STNet1239.6 Mbps
4.Mf-native61,27337.7 Mbps
5.Japan Network Information Center1,41032.4 Mbps
6.Commufa3331.6 Mbps
7.Jpne3,99430.7 Mbps
8.Tokai7128.6 Mbps
9.Mf-native6-w70628.0 Mbps
10.Sakura9327.5 Mbps
11.Ocn2,25026.6 Mbps
12.InfoSphere19524.8 Mbps
13.Hicat1024.4 Mbps
14.Medias522.0 Mbps
15.Kddi96918.7 Mbps
16.Bbix3,38318.6 Mbps
17.Iijnet14613.5 Mbps
18.K-opticom20612.6 Mbps
19.Jpix612.3 Mbps
20.interQ17411.9 Mbps
21.Asahi1010.8 Mbps
22.Choopa45710.6 Mbps
23.So-net Corporation510.6 Mbps
24.Iij32810.4 Mbps
25.NTTDoCoMo2110.1 Mbps