Also included in the promotion is the Roast Beef sub (which is a regular menu item), but Subway Japan has recently improved their roast beef so that it is thicker and weighs 10% more (i.e. you get more meat). Check it out:
It actually looks like sliced roast beef and not deli meat. I kinda wished I had tried Subway while I was in Japan now. The price stands at 490 yen for a 6-inch; roughly $6.26.
Here's a picture of the Coronation Chicken Sub:
Two drinks are also included in the promotion: Iced Royal Milk Tea and Mango Orange Juice
Mango Orange Juice is topped with frozen chunks of Mango and includes mango, orange, apple, and lemon juices. It's also 250 yen.
All photos courtesy of Subway Japan.