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 (Jun 2019)

  ISP IPv6 tests count
1.Jpne4,677
2.Ocn3,141
3.Mf-native62,795
4.Biglobe2,090
5.Bbix1,949
6.Internet Multifeed Co.1,462
7.Asahi318
8.Kddi306
9.Softbank BB Corp.279
10.Japan Network Information Center269
11.So-net Entertainment Corporation228
12.Choopa208
13.Japan Network Information Center, Internet Initiative Japan Inc.190
14.Hurricane Electric LLC161
15.InfoSphere156
16.Linode72
17.NTTDoCoMo68
18.i3D.net B.V. Tokyo Japan55
19.Chubu Telecommunications Company, Inc.54
20.NTT Communications Corporation54
21.K-opticom52
22.Energia Communications48
23.interQ45
24.Jupiter Telecommunication Co. Ltd40
25.Sakura35

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, Jun 2019)

  ISP Unique IPv6 addresses
1.Jpne2,870
2.Ocn1,983
3.Mf-native61,525
4.Biglobe1,173
5.Bbix1,093
6.Internet Multifeed Co.883
7.Asahi206
8.Japan Network Information Center175
9.Kddi169
10.So-net Entertainment Corporation150
11.Softbank BB Corp.149
12.Japan Network Information Center, Internet Initiative Japan Inc.138
13.Hurricane Electric LLC76
14.InfoSphere73
15.Choopa65
16.NTT Communications Corporation42
17.Linode41
18.K-opticom38
19.NTTDoCoMo33
20.Chubu Telecommunications Company, Inc.24
21.Energia Communications22
22.xTom Limited22
23.Cat Networks K.K.22
24.Fcc19
25.M247 Ltd19

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 (Jun 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.STNet700.0%7100.0%
2.Multifeed500.0%5100.0%
3.Ssd700.0%7100.0%
4.i3D.net B.V. Tokyo Japan5500.0%55100.0%
5.Community Network Center Inc.1715.9%1694.1%
6.Zaq1616.3%1593.8%
7.NTTDoCoMo6857.4%6392.6%
8.Sakura3538.6%3291.4%
9.Jpne4,67757712.3%4,10087.7%
10.Biglobe2,09029514.1%1,79585.9%
11.Shanghai Huajuan Information Technology Co7114.3%685.7%
12.Energia Communications48714.6%4185.4%
13.Mf-native62,79541314.8%2,38285.2%
14.Ocn3,14151616.4%2,62583.6%
15.Internet Multifeed Co.1,46224416.7%1,21883.3%
16.Bbix1,94932616.7%1,62383.3%
17.Kddi3065217.0%25483.0%
18.Fcc23417.4%1982.6%
19.Ipr5120.0%480.0%
20.Kir5120.0%480.0%
21.NTT Communications Corporation541120.4%4379.6%
22.Chinanet19421.1%1578.9%
23.Asahi3187824.5%24075.5%
24.Jupiter Telecommunication Co. Ltd401025.0%3075.0%
25.Chubu Telecommunications Company, Inc.541527.8%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 (Jun 2019)

  ISP Test count IPv6 average
1.Jupiter Telecommunication Co. Ltd4060.5 Mbps
2.Energia Communications4854.8 Mbps
3.Zaq1650.7 Mbps
4.Amazon Technologies Inc746.7 Mbps
5.Cat Networks K.K.3345.8 Mbps
6.M247 Ltd2934.2 Mbps
7.Community Network Center Inc.1733.5 Mbps
8.its communications Inc.1430.2 Mbps
9.Kddi30626.4 Mbps
10.Kir524.9 Mbps
11.Fcc2323.9 Mbps
12.Chubu Telecommunications Company, Inc.5422.6 Mbps
13.Ocn3,14121.4 Mbps
14.Asahi31821.2 Mbps
15.Japan Network Information Center26921.2 Mbps
16.InfoSphere15620.9 Mbps
17.Linode7220.9 Mbps
18.Jpne4,67720.6 Mbps
19.Biglobe2,09020.4 Mbps
20.So-net Entertainment Corporation22820.4 Mbps
21.Mf-native62,79519.9 Mbps
22.interQ4517.1 Mbps
23.Bbix1,94916.5 Mbps
24.KDDI Corporation1016.2 Mbps
25.NTT Communications Corporation5415.2 Mbps