The vegetarian burger they sell is called ベジタブルバーガービーンズ (Vegetable Burger Beans), costs 460 ¥ (+tax) and tastes good!
So when you feel like eating a burger or you are out somewhere and don't know where to get veggy food, you should check out if there is one close to you. Since there are very many Freshness Burger stores all over Tokyo, it's quite possible you are near one :) !
|Freshness Burger in Sengawa|
|Vegetarian Beans Burger|
Here only three of very many Freshness Burger stores in Tokyo: