Final answer:
To promote NFL-licensed goods in Japan, using local celebrity endorsements would likely be the most effective strategy, leveraging their local influence and credibility, while tapping into the existing popularity and global influence of American culture.
Step-by-step explanation:
To promote NFL-licensed goods in Japan effectively, an approach tailored to the local market is essential. While emphasizing American football culture and using the English language in advertisements could have some appeal due to the global influence of American culture and consumers' familiarity with "Made in USA" products, the most successful strategy would likely involve local celebrities endorsing the products. These celebrities have a significant influence on local consumers, and their endorsement would lend credibility and relatability to the products. Additionally, highlighting the exciting aspects of American football that can resonate with sports enthusiasts in Japan, rather than focusing on cultural differences, would help the NFL to connect with potential fans and customers in the Japanese market.