Country Report

Internet Service Providers in Japan

Top 50 organizations with the largest IP allocations in Japan

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Name IPv4 addresses AS numbers

Softbank BB Corp.

45,408,000 1

NTT Communications Corporation

28,994,816 12

KDDI CORPORATION

17,932,032 3

Research Organization of Information and Systems,

8,570,432 1

UCOM Corp.

5,382,143 1

Jupiter Telecommunication Co. Ltd

4,745,216 1

Internet Initiative Japan Inc.

3,796,992 1

BIGLOBE Inc.

3,675,136 2

So-net Entertainment Corporation

3,275,776 1

K-Opticom Corporation

3,135,744 1

FUJITSU LIMITED

3,089,152 1

NTT DOCOMO, INC.

2,674,432 1

SoftBank Mobile Corp.

2,164,224 3

Jupiter Telecommunications Co., Ltd.

2,045,952 9

FreeBit Co.,Ltd.

2,037,504 2

NTT PC Communications, Inc.

1,874,944 3

NTT-ME Corporation

1,644,032 1

Amazon.com, Inc.

1,630,720 1

ARTERIA Networks Corporation

1,553,152 1

Ymobile Corporation

1,491,968 2

TOKAI Communications Corporation

1,433,600 2

Chubu Telecommunications Company, Inc.

1,307,648 1

Yahoo Japan Corporation

1,092,096 11

SAKURA Internet Inc.

1,043,200 6

Asahi Net

905,216 1

QTnet,Inc.

696,832 1

NTT SmartConnect Corporation

453,632 1

STNet, Incorporated

431,104 1

its communications Inc.

404,480 1

Pacnet Services (Japan) Corp.

396,728 12

Kintetsu Cable Network Co., Ltd.

360,448 1

Recruit Holdings Co.,Ltd.

328,704 1

WIDE Project

328,448 6

Rakuten Communications Corp.

327,680 2

JR East Information Systems Company

327,168 1

ITEC HANKYU HANSHIN CO.,LTD.

286,720 1

NTT WEST CHUGOKU CORPORATION

279,808 1

KDDI Web Communications Inc.

276,736 1

NTT DATA CORPORATION

258,048 2

GMO Internet,Inc

252,928 6

Japan Network Information Center

234,496 3

Equinix Jpapan Enterprise K.K.

219,136 3

Energia Communications,Inc.

215,552 1

The University of Tokyo

200,576 3

National Institute of Advanced Industrial Science

199,936 1

KVH Co.,Ltd

195,584 1

Computer Engineering & Consulting, Ltd.

194,816 1

TOYOTA DIGITAL CRUISE.INCORPORATED

194,560 1

Community Network Center Inc.

186,880 2

BEKKOAME INTERNET INC.

176,384 1