Sudachi senbei are very delicious. They're a pleasant amount of tangy, not too sweet, and the senbei itself is crunchy and satisfying.
To increase interest and support for a Shikoku Shinkansen line, the Shikoku Shinkansen Seibisokushin Kisei Kai ran a Twitter poll in 2020 for what the Shikoku Shinkansen nickname should be. Sudachi won with 30% of the vote