IPv6 test - Statistics for 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.	Jpne	3,455
2.	Ocn	2,942
3.	Mf-native6	2,320
4.	Bbix	1,386
5.	Internet Multifeed Co.	1,333
6.	Biglobe	741
7.	Asahi	545
8.	Japan Network Information Center, Internet Initiative Japan Inc.	318
9.	Kddi	290
10.	Japan Network Information Center	251
11.	So-net Entertainment Corporation	248
12.	Softbank BB Corp.	226
13.	Hurricane Electric LLC	154
14.	Jupiter Telecommunication Co. Ltd	129
15.	Linode	101
16.	InfoSphere	95
17.	Choopa	92
18.	K-opticom	80
19.	KDDI Corporation	64
20.	NTT Communications Corporation	63
21.	NTTDoCoMo	53
22.	Energia Communications	50
23.	Choopa, LLC	49
24.	M247 Ltd	38
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.	Jpne	2,117
2.	Ocn	1,827
3.	Mf-native6	1,417
4.	Bbix	851
5.	Internet Multifeed Co.	776
6.	Biglobe	534
7.	Asahi	316
8.	Japan Network Information Center, Internet Initiative Japan Inc.	221
9.	Kddi	189
10.	So-net Entertainment Corporation	174
11.	Softbank BB Corp.	158
12.	Japan Network Information Center	146
13.	Hurricane Electric LLC	79
14.	InfoSphere	63
15.	K-opticom	50
16.	NTT Communications Corporation	40
17.	NTTDoCoMo	40
18.	Choopa	38
19.	KDDI Corporation	33
20.	Jupiter Telecommunication Co. Ltd	30
21.	Linode	29
22.	Energia Communications	28
23.	Choopa, LLC	24
24.	M247 Ltd	21
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.	8	0	0.0%	8	100.0%
2.	Home NOC Operators Group	8	0	0.0%	8	100.0%
3.	Zaq	15	0	0.0%	15	100.0%
4.	Ssd	11	0	0.0%	11	100.0%
5.	Tdnc	23	1	4.3%	22	95.7%
6.	Hokuden Information System Service Co., Ltd.	22	1	4.5%	21	95.5%
7.	Fcc	20	1	5.0%	19	95.0%
8.	STNet	12	1	8.3%	11	91.7%
9.	Energia Communications	50	5	10.0%	45	90.0%
10.	So-net Entertainment Corporation	248	29	11.7%	219	88.3%
11.	Kddi	290	35	12.1%	255	87.9%
12.	Tokai	24	3	12.5%	21	87.5%
13.	Internet Multifeed Co.	1,333	168	12.6%	1,165	87.4%
14.	Jpne	3,455	459	13.3%	2,996	86.7%
15.	Biglobe	741	101	13.6%	640	86.4%
16.	Japan Network Information Center	251	39	15.5%	212	84.5%
17.	Bbix	1,386	216	15.6%	1,170	84.4%
18.	Chubu Telecommunications Company, Inc.	32	5	15.6%	27	84.4%
19.	Mf-native6	2,320	365	15.7%	1,955	84.3%
20.	NTTDoCoMo	53	9	17.0%	44	83.0%
21.	Ocn	2,942	528	17.9%	2,414	82.1%
22.	K-opticom	80	15	18.8%	65	81.3%
23.	Hurricane Electric LLC	154	30	19.5%	124	80.5%
24.	Asahi	545	108	19.8%	437	80.2%
25.	Sony Computer Entertainment Inc, 1-7-1, Konan, Minato-ku, Tokyo 108-0075, Japan	5	1	20.0%	4	80.0%

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. Ltd	129	75.0 Mbps
2.	Choopa	92	48.6 Mbps
3.	NTTDoCoMo	53	47.9 Mbps
4.	KDDI Corporation	64	47.5 Mbps
5.	Zaq	15	44.0 Mbps
6.	Fcc	20	39.1 Mbps
7.	its communications Inc.	9	38.7 Mbps
8.	Energia Communications	50	34.4 Mbps
9.	M247 Ltd	38	30.7 Mbps
10.	So-net Entertainment Corporation	248	24.8 Mbps
11.	K-opticom	80	24.2 Mbps
12.	Biglobe	741	23.0 Mbps
13.	Choopa, LLC	49	19.9 Mbps
14.	interQ	26	18.8 Mbps
15.	Jpne	3,455	18.5 Mbps
16.	Ocn	2,942	17.7 Mbps
17.	Asahi	545	17.4 Mbps
18.	Japan Network Information Center	251	17.3 Mbps
19.	Mf-native6	2,320	16.5 Mbps
20.	Kddi	290	16.2 Mbps
21.	Bbix	1,386	16.0 Mbps
22.	NTT Communications Corporation	63	15.8 Mbps
23.	InfoSphere	95	15.1 Mbps
24.	Internet Multifeed Co.	1,333	14.9 Mbps
25.	Hurricane Electric LLC	154	14.3 Mbps