The Shin'yō and other suicide weapons reflected Japan's deteriorating position rather than solving its naval problems. Japanese planners hoped mounting losses would compel the Western powers to pause, negotiate, or withdraw. The strategic alternatives were invasion or blockade, both bleak from Japan's perspective. British ideas favoured blockading Japan, while the American preference was invasion to end the war and secure political change. The small boats belonged to a wider calculation about resistance, national mobilisation, and the expected cost of an assault on the home islands.
Notable Point · 1:17:27-1:22:48
Shin'yō suicide boats and strategic desperation
The discussion of Shin'yō boats places Japan's small-craft suicide weapons within a broader attempt to impose casualties and deter invasion.