Japan

Users able to use IPv6 (APNIC)

61.9%

Source: APNIC Labs IPv6 measurement · as of 2026-10-14

Users preferring IPv6 (APNIC)

59.6%

Source: APNIC Labs IPv6 measurement · as of 2026-10-14

APNIC measurement samples

76,293,912

Source: APNIC Labs IPv6 measurement · as of 2026-10-14

IPv6 users (Cisco 6lab)

37.2%

Source: Cisco 6lab statistics (community mirror) · as of 2026-10-14

IPv6 allocated (/32 equivalents)

10,224

APNIC, ARIN, RIPE NCC

Source: APNIC delegation file, ARIN delegation file (extended), RIPE NCC delegation file · as of 2026-10-14

Top websites on IPv6

Share of the country's top websites fully reachable over IPv6: web 18.0%, email 36.0%, DNS 94.0%.

Source: Vyncke IPv6 deployment status (top websites per country) · as of 2026-10-14

Source: APNIC Labs per-economy history and networks · as of 2026-10-14

Network	IPv6-capable	Prefers IPv6	Samples
AS2516 KDDI - KDDI CORPORATION	89.9%	88.6%	15,870,523
AS17676 GIGAINFRA - SoftBank Corp.	62.7%	59.5%	13,163,094
AS4713 OCN - NTT DOCOMO BUSINESS,Inc.	67.1%	64.7%	8,437,959
AS9605 docomo - NTT DOCOMO, INC.	87.9%	87.2%	4,689,974
AS9824 JTCL-JP-AS - JCOM Co., Ltd.	22.7%	21.6%	3,718,317
AS17511 OPTAGE - OPTAGE Inc.	62.4%	60.7%	3,549,685
AS2518 BIGLOBE - BIGLOBE Inc.	79.6%	78.5%	3,343,408
AS2527 So-net - Sony Network Communications Inc.	73.5%	69.3%	2,896,239
AS18126 CTCX - Chubu Telecommunications Company, Inc.	77.3%	74.7%	1,951,802
AS2519 VECTANT - ARTERIA Networks Corporation	51.2%	49.9%	1,225,627
AS138384 RMNI-AS-AP - Rakuten Mobile Network, Inc.	94.3%	93.6%	1,175,994
AS7679 QTNET - QTnet,Inc.	24.5%	23.2%	1,016,915
AS10010 TOKAI - TOKAI Communications Corporation	20.0%	18.9%	978,801
AS17506 UCOM - ARTERIA Networks Corporation	3.8%	2.7%	880,751
AS9617 ZAQ - JCOM Co., Ltd.	25.6%	24.4%	875,912
AS4685 ASAHI-NET - Asahi Net	71.9%	68.2%	844,603
AS7522 STCN - STNet, Incorporated	62.6%	61.2%	636,226
AS18081 KCN - Kintetsu Cable Network Co., Ltd.	1.7%	0.4%	474,429
AS4721 JCN - JCOM Co., Ltd.	1.4%	0.4%	464,813
AS2497 IIJ - Internet Initiative Japan Inc.	38.1%	36.5%	424,907

Source: APNIC Labs per-economy history and networks · as of 2026-10-14