Phil in SF quoted Judgment at Tokyo by Gary J. Bass
In the weeks after Japan finally surrendered to the Allies to end World War II, …
His American and Japanese lawyers argued that Matsui's militant pan-Asianism was a mere cultural divertissement, demonstrating his innocuous love for the Chinese he would soon be invading.
— Judgment at Tokyo by Gary J. Bass (Page 1,385)
new word: divertissement
a minor entertainment or diversion