Mazesoba can be explained as Japanese dry Ramen, which Maze means "to mix" and soba simply means noodles.
How to eat Mazesoba? First you mix everything for 20 seconds. Then add vinegar or chili oil, depending on your preferences. When you had finish eating, you can request for a small portion of rice to mix with the remaining sauce by mentioning “OIMESHI!” to their staff. They also offer free noodles upsize, so it's guarantee that you'll leave the restaurant with a happy stomach.

They have pretty affordable price too; Taiwan Mazesoba Nagoya Style ($12.80++) Original Mazesoba with Karaage ($15.80++) KAJIKEN Singapore is the first shop dedicated to Mazesoba in Singapore, and they are conveniently located at Paya Lebar Square #01-86.

Thanks @kajikenatpls for the lunch.