It came out this year too! (Image source: Subway official Twitter)
At each Subway store, the sandwich "Ehomaki Sub" for Setsubun is on sale until February 3 (excluding some stores).
Ehomaki Sub is a menu for Setsubun, which is a "foot long" size sandwich wrapped with "Noshigami". The length is about 30 cm. For an additional 300 yen (tax included) to the price of regular sandwiches, you can make all sandwiches into Ehomaki subs.
For a limited time, Ehomaki Sub (Image source: Subway official website)
Why don't you stick to a long sandwich on Setsubun day? This year's (2019) ehomaki is "east-northeast".