Jinya Ramen Bar is a Japanese fast-food restaurant which serves ramen, curries, salads and more. It is a chain founded in 2010. They have many offerings, and their website includes the a description of each dish. There is the quinoa salad and the spicy tofu salad, however please check if these are definitely vegan. In terms of ramen, there is the labelled Spicy Creamy Vegan Ramen, and the Vegetable Soup Ramen. Just ask if the latter is made with vegetable broth, as many dishes are made with pork or chicken broth. Many additional toppings are vegan.
(can vary during public holidays)