1. One Piece's Struggle with Overseas Popularity:
- The article suggests that One Piece has not been able to surpass Naruto's popularity in overseas markets.
- This is attributed to the perceived lack of literacy or reading comprehension among some international audiences, who may prefer the more straightforward narrative style of Naruto.
- The article cites the opinion of Yahagi Kosuke, who believes that One Piece's complex storylines and character development can be challenging for some readers to fully grasp.

2. The Importance of Accessibility in Manga Popularity:
- The article suggests that the accessibility of a manga's narrative style can play a significant role in its international popularity.
- Naruto's more straightforward plot and character arcs are seen as more easily digestible for some overseas audiences, contributing to its sustained popularity.
- In contrast, One Piece's intricate storytelling and extensive character development may present a higher barrier to entry for some readers, limiting its international appeal.

3. Potential Strategies for Improving One Piece's Overseas Reach:
- The article implies that One Piece may need to explore ways to make its narrative more accessible and engaging for international audiences.
- This could involve strategies such as simplifying certain plot elements, emphasizing more action-oriented sequences, or finding other ways to cater to the preferences of overseas readers.
- Ultimately, the article suggests that One Piece's continued success in overseas markets may depend on its ability to adapt its storytelling approach to better suit the needs and expectations of international audiences.