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 2020)

  ISP IPv6 tests count
1.Jpne3,455
2.Ocn2,942
3.Mf-native62,320
4.Bbix1,386
5.Internet Multifeed Co.1,333
6.Biglobe741
7.Asahi545
8.Japan Network Information Center, Internet Initiative Japan Inc.318
9.Kddi290
10.Japan Network Information Center251
11.So-net Entertainment Corporation248
12.Softbank BB Corp.226
13.Hurricane Electric LLC154
14.Jupiter Telecommunication Co. Ltd129
15.Linode101
16.InfoSphere95
17.Choopa92
18.K-opticom80
19.KDDI Corporation64
20.NTT Communications Corporation63
21.NTTDoCoMo53
22.Energia Communications50
23.Choopa, LLC49
24.M247 Ltd38
25.Chubu Telecommunications Company, Inc.32

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 2020)

  ISP Unique IPv6 addresses
1.Jpne2,117
2.Ocn1,827
3.Mf-native61,417
4.Bbix851
5.Internet Multifeed Co.776
6.Biglobe534
7.Asahi316
8.Japan Network Information Center, Internet Initiative Japan Inc.221
9.Kddi189
10.So-net Entertainment Corporation174
11.Softbank BB Corp.158
12.Japan Network Information Center146
13.Hurricane Electric LLC79
14.InfoSphere63
15.K-opticom50
16.NTT Communications Corporation40
17.NTTDoCoMo40
18.Choopa38
19.KDDI Corporation33
20.Jupiter Telecommunication Co. Ltd30
21.Linode29
22.Energia Communications28
23.Choopa, LLC24
24.M247 Ltd21
25.Chubu Telecommunications Company, Inc.18

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 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Japan Network Information Center, Cable Networks Akita Co., Ltd.800.0%8100.0%
2.Home NOC Operators Group800.0%8100.0%
3.Zaq1500.0%15100.0%
4.Ssd1100.0%11100.0%
5.Tdnc2314.3%2295.7%
6.Hokuden Information System Service Co., Ltd.2214.5%2195.5%
7.Fcc2015.0%1995.0%
8.STNet1218.3%1191.7%
9.Energia Communications50510.0%4590.0%
10.So-net Entertainment Corporation2482911.7%21988.3%
11.Kddi2903512.1%25587.9%
12.Tokai24312.5%2187.5%
13.Internet Multifeed Co.1,33316812.6%1,16587.4%
14.Jpne3,45545913.3%2,99686.7%
15.Biglobe74110113.6%64086.4%
16.Japan Network Information Center2513915.5%21284.5%
17.Bbix1,38621615.6%1,17084.4%
18.Chubu Telecommunications Company, Inc.32515.6%2784.4%
19.Mf-native62,32036515.7%1,95584.3%
20.NTTDoCoMo53917.0%4483.0%
21.Ocn2,94252817.9%2,41482.1%
22.K-opticom801518.8%6581.3%
23.Hurricane Electric LLC1543019.5%12480.5%
24.Asahi54510819.8%43780.2%
25.Sony Computer Entertainment Inc, 1-7-1, Konan, Minato-ku, Tokyo 108-0075, Japan5120.0%480.0%

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 2020)

  ISP Test count IPv6 average
1.Jupiter Telecommunication Co. Ltd12975.0 Mbps
2.Choopa9248.6 Mbps
3.NTTDoCoMo5347.9 Mbps
4.KDDI Corporation6447.5 Mbps
5.Zaq1544.0 Mbps
6.Fcc2039.1 Mbps
7.its communications Inc.938.7 Mbps
8.Energia Communications5034.4 Mbps
9.M247 Ltd3830.7 Mbps
10.So-net Entertainment Corporation24824.8 Mbps
11.K-opticom8024.2 Mbps
12.Biglobe74123.0 Mbps
13.Choopa, LLC4919.9 Mbps
14.interQ2618.8 Mbps
15.Jpne3,45518.5 Mbps
16.Ocn2,94217.7 Mbps
17.Asahi54517.4 Mbps
18.Japan Network Information Center25117.3 Mbps
19.Mf-native62,32016.5 Mbps
20.Kddi29016.2 Mbps
21.Bbix1,38616.0 Mbps
22.NTT Communications Corporation6315.8 Mbps
23.InfoSphere9515.1 Mbps
24.Internet Multifeed Co.1,33314.9 Mbps
25.Hurricane Electric LLC15414.3 Mbps