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 (Dec 2016)

  ISP IPv6 tests count
1.Jpne3,827
2.Bbix2,640
3.Ocn1,787
4.Sbb1,570
5.Japan Network Information Center1,356
6.Mf-native61,192
7.Kddi859
8.Mf-native6-w734
9.Hurricane Electric720
10.Choopa576
11.K-opticom379
12.Iij310
13.Cernet302
14.InfoSphere132
15.Iijnet129
16.interQ121
17.Bbtec105
18.Jpnic104
19.Jtcl87
20.Sakura74
21.Tokai63
22.Commufa50
23.Linode46
24.Cttnet45
25.Biglobe44

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, Dec 2016)

  ISP Unique IPv6 addresses
1.Jpne2,104
2.Bbix1,657
3.Sbb1,185
4.Ocn995
5.Japan Network Information Center799
6.Mf-native6646
7.Kddi583
8.Hurricane Electric402
9.Mf-native6-w399
10.Iij217
11.Choopa141
12.Iijnet102
13.InfoSphere78
14.Bbtec59
15.interQ55
16.Jtcl54
17.K-opticom53
18.Tokai48
19.Jpnic41
20.Biglobe37
21.Sakura35
22.Commufa31
23.Infoweb26
24.Buaa6-cernet223
25.Linode22

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 (Dec 2016)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Jpix600.0%6100.0%
2.NTTDoCoMo1300.0%13100.0%
3.Ssd2100.0%21100.0%
4.Hinet3213.1%3196.9%
5.Jpnic10476.7%9793.3%
6.STNet1317.7%1292.3%
7.Cttnet4548.9%4191.1%
8.Bit-drive1119.1%1090.9%
9.Zaq4349.3%3990.7%
10.Comcast Cable Communications10110.0%990.0%
11.WIDE Project8112.5%787.5%
12.Apnic Portables819315.8%1684.2%
13.Commufa50816.0%4284.0%
14.Kddi85913816.1%72183.9%
15.Mediacat6116.7%583.3%
16.Bbix2,64045317.2%2,18782.8%
17.Jpne3,82766317.3%3,16482.7%
18.Sbb1,57031119.8%1,25980.2%
19.Iij3106220.0%24880.0%
20.Hicat10220.0%880.0%
21.Ultina10220.0%880.0%
22.Mf-native61,19224720.7%94579.3%
23.Ipr14321.4%1178.6%
24.Tokai631422.2%4977.8%
25.Iijnet1292922.5%10077.5%

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 (Dec 2016)

  ISP Test count IPv6 average
1.STNet1355.3 Mbps
2.Cwidc2550.4 Mbps
3.Mf-native61,19246.9 Mbps
4.Japan Network Information Center1,35640.4 Mbps
5.InfoSphere13234.2 Mbps
6.Ocn1,78732.4 Mbps
7.Jpne3,82730.7 Mbps
8.Mf-native6-w73428.3 Mbps
9.Tokai6325.7 Mbps
10.Bbix2,64025.3 Mbps
11.Commufa5024.5 Mbps
12.Hicat1024.4 Mbps
13.Kddi85924.1 Mbps
14.Jtcl8722.2 Mbps
15.Tdnc1621.6 Mbps
16.Sannet816.8 Mbps
17.interQ12114.2 Mbps
18.Sakura7413.6 Mbps
19.University of Tsukuba, Sangaku Renkei Kenkyukai2913.2 Mbps
20.Jpix612.3 Mbps
21.Iij31012.0 Mbps
22.Asahi1310.0 Mbps
23.Iijnet1299.9 Mbps
24.Jpnic1049.4 Mbps
25.Zaq439.2 Mbps