Final answer:
The Japanese crowd's subdued expressions of appreciation at a sporting event are likely due to cultural display rules, which emphasize collective behavior and group harmony in Japanese culture.
Step-by-step explanation:
A contributing factor to the mainly Japanese crowd showing less appreciation than you might expect at a sporting event could be a. Cultural display rules. In many Eastern societies, particularly in Japanese culture, collective behavior is emphasized over individual expression. People from collectivistic cultures, which include many Asian countries, may appear less expressive in group settings as a way of maintaining group harmony and social balance. They may show appreciation in subtler ways that are consistent with societal norms and expectations for behavior during public events.