Best restaurants you can enjoy Somen [そうめん:Somen] in Japan! Somen is a type of noodle dish that people enjoy it in summer seasons in Japan. Generally, Somen is often boiled, chilled and eaten with its dipping sauce called Mentsuyu. Also, in party scene, Somen is sometimes eaten in a fun way. It is called "nagashi somen," flowing Somen. When you try nagashi somen, you have to catch the noodles flowing in a bamboo pipe with chopsticks!