Chef-owner Kazuya (left) tops off an order of Spicy Tan Tan Men. (Photo: Karissa Gall)

Chef-owner Kazuya (left) tops off an order of Spicy Tan Tan Men. (Photo: Karissa Gall)

Remember when we told you there were four new ramen spots to try? Well, make that five. Ryujin Ramen Brooklyn opened at 513 Grand Street on February 1 and they’re serving up a secret dish. Unfortunately, I’ve been asked not to name it, but I can tell you that it’s one of the most popular broths in Japan. Chef-owner Kazuya Miyashita says it’s very time-intensive to make, so he’ll only be making 10 servings a day. Those 10 servings will go to the first 10 customers who ask for the flavor by name.

Grand opening of Ryujin Ramen Brooklyn. (Photo: Karissa Gall)

Grand opening of Ryujin Ramen Brooklyn. (Photo: Karissa Gall)

Otherwise, Miyashita, who started cooking in Japan at age 18, recommends the Ryujin Spicy Tan Tan Men. Staffer Kanako added that the $15 dish, which has chicken broth with special sesame paste, spicy ground pork, scallion, spinach, small dried shrimp, cashew nuts and soft-boiled egg, is very popular in Japan because “it’s half Chinese and half Japanese… it’s a little exotic.”

Keep an eye out for posters of Okinawa island on the walls of the restaurant’s dining area. They’re an homage to one of the sister locations in Japan (in Miyako and Tokyo).

Ryujin Ramen, 513 Grand St., Williamsburg; 212-709-9888.