Viewing Russia as the primary threat to Japan, he wrote and published a large volume of anti-Russian propaganda, visited Vladivostok to gather intelligence on Russian activities in Asia, and vigorously advocated Japanese expansion into the Amur River Basin as a buffer against Russian aggression.
He wrote extensively about Russia being Japan's primary threat, published this work, visited Vladivostok for intelligence gathering on Russian operations in Asia, and strongly advocated for Japanese territorial expansion into the Amur River region to counter Russian aggression.