The primary mover in this is Kenji Suzuki (old pages) of the National Institute of Information and Communications Technology.

K. Suzuki, Near Real-time IP Based Disaster Imaging Data Acquisition System Using a Small Satellite (in Japanese), seminar, Monozukuri Leadership Development Program for Space Exploration and Research, Nagoya University, 17 January 2014.

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In English

N. Omoto, H. Kato, K. Wakamori, Y. Kameda, K. Suzuki, N. Nishinaga and Y. Suga, A Study of Disaster Monitoring System using the Near Real-Time Small Satellite Constellation, paper 2009-n-14, 27th International Symposium on Space Technology and Science (ISTS) conference, July 2009.

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In Japanese - IEICE summaries of work

K. Suzuki, K. Wakamori, H. Kato and N. Omoto, Near Real-time IP Based Disaster Imaging Data Acquisition System Using a Small Satellite (in Japanese), IEICE Technical Report, vol. 112, no. 191, SAT2012-32, pp. 85-89, August 2012 (IEICE).

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K. Suzuki, K. Wakamori, H. Kato, N. Omoto and W. Ivancic, Near real-time IP based disaster imaging acquisition system using small satellite (3) (in Japanese), IEICE Society Conference, Hokkaido University, Sapporo, 13-16 September 2011.

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K. Suzuki, K. Wakamori, H. Kato, N. Omoto, T. Okamoto and R. Suzuki, Near real-time IP based disaster imaging acquisition system using small satellite (2) (in Japanese), IEICE Society Conference, Niigata, Japan, September 2009.

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K. Suzuki, N. Nishinaga, H. Kato, N. Omoto and Y. Suga, Near Real-time IP based disaster imaging data acquisition system using small satellite (in Japanese), The Institute of Electronics, Information and Communication Engineers General Assembly, 2007, B-3-5, p. 255, September 2007.

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25.04.2008 - DMC Satellite Downloading Imagery to Japan
DMC satellite, UK-DMC successfully downloaded a complete image of Hiroshima prefecture to the National institute of Information and Communication Technology (NiCT) Groundstation. Imagery downloaded on the morning of April the 25th, including a clear picture of Hiroshima city, used the standard internet protocols that make receiving imagery from DMC satellites a routine task.

See also our Internet to orbit paper, available in Japanese.
Japanese translation of Internet to Orbit from Packet Japan, Winter 2005, pp. 26-31.