The Sakhalin Island event, while comparatively small, has resulted in the Japan Meteorological Agency issuing a "Tsunami Attention" bulletin for the west coast of Hokkaido. A small tsunami of 30 centimeters was measured in Hokkaido, and more on a similar scale are possible. These are way too small to cause the kind of damage associated with Thailand a couple of years back.
The Sakhalin earthquake itself has caused at least one fatality on the island, which is off Russia.
Tsunami Warning/Advisory
Issued at 13:37 JST 02 Aug 2007
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Tsunami Attension has been issued.
NORTHERN PART OF JAPAN SEA COAST OF HOKKAIDO