Log exports from Canada to Japan have dropped in recent months despite a side deal to the Trans-Pacific Partnership designed to ensure stable supply, raising concerns of a possible first violation of the regional trade pact.  Shipments fell 77% on the year in the January-May period to 97,380 sq. meters, according to the Japan Lumber Importers' Association. No logs were shipped at all in April, and May's figure was just 5% of the level a year earlier.  Japan relies on other countries for over 60% of its wood products. Last year, 28 ...