Sports officials say Yasuhiro Suzuji had a history of sabotaging competitors.
Olympic gold medallist Tim Brabants will join British Canoeing's sprint programme as a technical coach.
Ukrainian canoeist Igor Trunov is banned for four years and stripped of four medals following a positive drug test.
Great Britain's Fiona Pennie finishes 10th in the women's kayak singles at the World Slalom Canoeing Championships in Pau.
Audio & Video
Great Britain's Mallory Franklin wins gold in the women's C1 at the Canoe Slalom World Championships in Pau.
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How to get into Canoeing & Kayaking
How to get into Canoeing - from calm, steady touring to racing down white water.
How to get into Canoe Sprint
How to get into canoe sprint - head-to-head racing or simply learning to paddle along a waterway near you.