August 27, 2025 Estimates for Internet Traffic in Japan
Announcement of aggregate results as of May 2025

　The Ministry of Internal Affairs and Communications (MIC) now publishes the results of the traffic (data volume) survey conducted for Japan’s fixed broadband internet services. In order to understand the actual situation, the survey was carried out in May 2025 with the cooperation of Internet Service providers ^{(Note 1)}, Internet Exchanges (IXs) ^{(Note 2)}, and researchers ^{(Note 3)}.

Note: The published materials are in Japanese only.

Main Points
As of May 2025, the total download traffic for subscribers ^{(Note 4)} of Japan’s fixed broadband Internet service ^{(Note 5)} was estimated at approximately 41.6 Tbps (about 276.7 GB per contract per month ^{(Note 6)}), an increase of 15.3% from the volume of the same month of last year.

Note 1: Internet Initiative Japan Inc., NTT DOCOMO BUSINESS, Inc., NTT DOCOMO, Inc., OPTAGE Inc., KDDI Corporation, JCOM Co., Ltd., SoftBank Corp., NIFTY Corporation, and BIGLOBE Inc.
Note 2: Internet Multifeed Co., Equinix Japan K.K., Japan Internet Xing Co., Ltd., BBIX, Inc., and WIDE Project
Note 3: ESAKI Hiroshi, (Professor, University of Tokyo), KATO Akira, (Professor, Keio University), SEKIYA Yuji (Professor, University of Tokyo), CHO Kenjiro, (Research Director, IIJ Research Laboratory), and FUKUDA Kensuke, (Associate Professor, National Institute of Informatics).
Note 4: Fixed broadband services for individual users (FTTH, DSL, CATV and FWA)
Note 5: Includes some corporate subscribers
Note 6: Calculated on the basis of 1 month as 30.4375 days.